I'm not sure. My laptop (which most people have) is 1360x768, but my monitor is 1440x900. Most people have monitors, but they also use the laptop screen when they away from their office. Is it better to do it in a smaller resolution?
You may have missed my drift.
What is the MINIMUM monitor resolution of your target audience?
You need to find this out because it's irrelevant what size monitor YOU have or even what the maximum resolution available on most laptops is. The critical thing is what your users are running and how small (not how big) you need to make your content in order to leave room for browser toolbars, chrome, playbars etc.
Your local unfriendly IT dudes are often able to quote the results of scripts they run when user's log into the network and give you a breakdown of all users by monitor resolution. If you can't get this info, then you need to either survey your audience yourself, or just assume a given monitor resolution and work for that. If you get it wrong and use one that's too big, you'll be deluged with complaints from users on 1024x768 monitors that cannot see your content or reach the navigation buttons on your playbar.