Excellent idea but, not new. On the cover of the Max Lange Attack Koltanowski uses simular flat pieces. Yours are better looking though!
Poker Chip Chess Set!
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You can buy flat chess pieces from a few different places.
http://www.chessmate.com/chessmate1.html#Disk_Pieces_120
Personally, if I were going to make a chess set with uniform style pieces I would prefer something like a Xiangqi or Shogi set. 
Very durable and portable.
Thanks everyone! Those flat pieces are nice but they're very thin and tiny. The pieces I'm talking about are poker pieces. They're large enough to feel like a real game. They've been meticulously improved upon for a century. The size, material, everything was carefully considered. I like where you're going with your link to the vinyl pieces, but you can't play around with those pieces like people do with poker chips. We're talking real, clay-polymer, poker chips that you can pick up and move and throw around. It's like using a sharp new knife for the first time. It just feels good how well it slices. This set is supposed to just feel good. And it'll be convinient/portable.
Nice!
I've played chess at a casino poker room while playing poker at the same time!
Let's delete all of these poker threads and start from scratch
Wait, what ever happened to this idea?
$15 a set (more or less)
I'm making a poker chip chess set. I see poker players playing with chips and doing all sorts of cool stacking tricks. I want a set that's fun to handle and super portable. Poker chips were designed for exactly this purpose.
If I get 25 people interested I'll make it official with a Kickstarter website. We need 25 people because the minimum order on poker chips is 50 per custom design.
Let me know if you're interested! Here's an example picture:
Bonus: You can stack the pieces when they capture. So if your knight captures a pawn, you can stack the knight on top. Now it's a stack of two chips. You can literally see how powerful each piece was in that game.
Also, it's a portable set that's still fun to play and can impress your friends. Playing on tiny sets with miniature pieces is tedius. But if you flatten the pieces instead of shrinking them, you still get the feel of a life sized, actual game. And they're poker chips... so they're fun to throw around.