I have a 27 inch screen, but i still like websites that don't go any bigger than 1024 or 1280.
I do also like cool ones who go bigger. But i feel lots of people tend to go with realy wider sites for the wrong reason.
Main reason i always see is screen size and screen resolutions. Yes, nowadays we have bigger screens and higher resolutions. But with my 27 inch screen and a resolution of 2560 x 1440, do i ever have my browser window full screen? Never. And i think most people with realy larger screens and higher resolutions barely use their entire screen to browse.
That's why i think, and my own surfing experience is that a site which goes up to 1024 or 1280 is still very pleasant to look at and interact with.