A hard question to answer. I was unable to find any surveys on exactly this question but did find a few sites which allowed users to view the most common resolutions used by web browser computers on their sites. Seems that 1280x1024 is very popular but followed by 1366x768 and 1920x1080. This is understandable due to the increased sales of widescreen, HD capable monitors.
I hope this helps narrow it down for you.
Resolutions - album - was created on 2011-01-24.
Son of a Pitch - 2011 Last Year's Resolutions 1-6 was released on: USA: 19 December 2011
Some things that have been invented since 1998 are the flat screen tv, flat screen computer
From Script to Screen Mobilefilmworks - 2011 was released on: USA: 1 March 2011
Screen Junkies MashUps - 2011 was released on: USA: 2 January 2011
Albanian Screen was created in 2011.
Behind the Britcoms From Script to Screen - 2011 TV was released on: USA: 5 March 2011
Disney Second Screen was created in 2011.
Live from the Red Carpet The 2011 Screen Actors Guild Awards - 2011 TV was released on: USA: 30 January 2011
Screen Test - 2010 was released on: USA: 2011
Doel - computer - was created in 2011.
The HP TouchSmart was first marketed in early 2007. It was the first desktop PC introduced which had a touchscreen instead of the standard computer screen.