There's a significant faction within the web-design community whose philosophy is, essentially, "I may have a monitor that's 50,000 pixels across, but you'll have to put a gun to my head before I'll increase the size of my browser window past 800x600".
\r\n\r\nIt's becoming something of a holy war -- any time someone speculates on whether increased monitor resolution should start affecting design, a ton of people come out of the woodwork and respond with stories of how you can maximize their browser windows over their dead bodies.