That is what I hope but there are a couple of threads posted by premium members who cannot access their Live Chess games in Game Explorer.
Premium Membership, Live Chess, & Game Explorer
It's a legitimate concern. Sometime in the last 2 weeks Erik himself posted that it was taking much longer than expected to make the games available. He just bought 3 new servers to try and accelerate the process. Some don't even have access to their "online" games yet. I have online, but not live.
Thanks for the insight baddogno. I am concerned because I have almost 200 live games but only 1 online and the game explorer feature would be one of my main reasons for buying premium membership.
Wish I remembered the exact thread so you could read Erik's post yourself. It will get done, and is geting done, but it's taking much more time than expected to move data from one "farm?" to another. He said he was waiting for his 3 new $4k servers to come on line. Something like that.
Of course if you were to explore offsite options, not as scary as it sounds; I mean I figured out how to do it and so could you. I mean 5 minutes even if all you can do is mouseclick and up and running sites. Sites that might, just might, also contain a database of their own. I understand that $10 a year gets you a personal database. Import your pgn files from chess.com and you're good to go. Did I mention that it's available 365 days a year? 
Standard membership only gets 30 day game access in your archive if I remember correctly; the games don't dissapear, just aren't accessible unless you go premium. Will your games be there for you immediately when you upgrade or will you have to wait? Unless you have copies of your games in pgn this won't work. So maybe my suggestion isn't so great, unless you've played all your games in the last month....
I am strongly considering becoming a diamond member. However, I would like some assurance that all or most of my Live Chess games (past and future) will be imported into Game Explorer once I am a premium member. Is there anyway that staff could comment on this please?