I think Caruana has a room for improvement. I didnt like two of the first 9 moves when he lost for Magnus. I didnt like 6 a5 and 9 a4, thought they were to slow.
So, if Caruana gets significantly better, he is going to be very, very good.
Because he already is extremely good. When he beat Magnus, he was playing very well.
It is difficult to predict things in advance :-) In the mid-90s Kamsky passed the five years older Anand on the rating list and looked like the coming man of the two.
Kamsky also quit playing chess at the age Carlsen is now. Had he played competitively through his 20s, it would be entirely different.
I am not becoming any kind of a star, but I can prove that it is absolutely possible to gain strenght and learn after you are 50. In january I started a tournament at ca 1330 strenght, today I am at 1683, and when the tournament finishes????. I am absolutely not elite, but it shows that it is possible to go further even as middleaged. Actually I am testing myself at the best 9 and 10 year old players in Norway. How far and fast will they pull away. I am at a good 9-year level, and the ten year old boy is ahead, going longterm for GM. I probably never will catch up, but I try, yes I try, yes I try! And if I could catch up, then I might become GM at the age of 60? And when I am 70, I will challenge Magnus.
Anand has improved this year, and there is room for more.
yeah sure, once Carlson dies
Nakamura can be a future World Chaampion if he is able to improve more than his competitors in the years to come.
...only in that variant future where the other top 50 chess masters boarded Flight 370 from Malaysia...and disappeared. 
I said IF he is able to improve more, if they are 50 on the ca same level, his chances are maybe one to 100, because the others also can improve, and because Magnus is hard to catch up on.
Actually I guess that Caruana has an easier way up, if he can fix his bottomlevel, and level it out with his toplevel, then he makes a significant step.
Magnus probably has the highest bottomlevel of all players in the world. He can fight himself out of deep mess.
More likely that he retires by 30 than he wins the title IMO.
Nakamuras games are exciting because he takes risks and allows his opponents counterplay. The kind of player that makes chess exciting. His games contain the element of being beaten if his opponent can find the right answer. Compared to Carlsen i prefer playing over Nakas games. BUt the sad part is the more he takes risks the more he cannot find his was into the murky waters of elite grandmaster complicated play. I still rememebr the game he lost to Carlsen where he missed a win.
I am not becoming any kind of a star, but I can prove that it is absolutely possible to gain strenght and learn after you are 50. In january I started a tournament at ca 1330 strenght, today I am at 1683, and when the tournament finishes????. I am absolutely not elite, but it shows that it is possible to go further even as middleaged. Actually I am testing myself at the best 9 and 10 year old players in Norway. How far and fast will they pull away. I am at a good 9-year level, and the ten year old boy is ahead, going longterm for GM. I probably never will catch up, but I try, yes I try, yes I try! And if I could catch up, then I might become GM at the age of 60? And when I am 70, I will challenge Magnus.
Anand has improved this year, and there is room for more.
Anand has not improved, he has recovered his level from years 2007-2010
Now three big GMs are leading Norway against Magnus in a votechessbattle:
http://direkte.vg.no/studio/carlsen-vs-norge/#!videoId=81645
Yup, the next world champion after Carlsen will probably be some kid none of us have heard of yet.
It's gonna be MEE!!
not gonna happen now
Uh...............no. So sorry, not gonna happen.
I've said this many times: already-GM Rich Rapport.
GM Rich Rapport is the world nr one under 18, with a 2701 rating.
That means he is very dangerous, and an extremely serious contender.
I think I shal read a lot of his games.
I know a good strategy for Naka that will enable him to have a shot at World Champion... it's called TRUCK. And it has to be fast, right through Carlsen's body when the latter crosses the street.
Karjakin was very good , very early. We dont have 2500+ kids in Norway now. But Aryan and Johan are absolutely supertalents. It is not necessary to become GM early to be best, it is enough to be the best later, and if you reach the top when you are 20 or 40 is not crucial. It takes time to add the necessary knowledge to be best in the world. Time, food, competition and talent. And some money.
Wei Yi is a safer bet for beating Magnus than the Norwegians, but i guess that there are a lot of talents around the world, rated below 2000, and even below 1200, that in the future will become terrifying good.