But not all games will let you run at native resolution, like Crysis and a few others. I thought about getting a 24 inch LCD but with the new DX10 I don't know what to expect from newer games using the new API, so I'm holding on to my 19" LCD for now. Hatachi just came out with an LCD thats only 35mm thick or 1.5 inches.
You gotta realize that games will always be pushing graphics technology to the limits. Whenever you buy the fastest, most expensive GPU you can always bet that some game will bring your system to it knees in about 1 - 1.5 years after you buy the GPU.
If I do buy a new monitor/LCD it will be a 20" incher, don't like the dot pitch of the 22" inchers. My eye sight is 20/20 and can see the little squares (pixels) that make up a 22" inch LCD, and have seen a big difference between the 20-22" inch LCD's.