While using my Centro, I began wondering how much wider, if at all, the Palm Pre's screen would be. I knew it was 3.1" diagonal, but how does that compare to the Centro's square 2.2" screen? Or my old Treo 700p's 2.5" square screen?
Not being able to visualize, I whipped up a quick and dirty comparison and included two other 320x480 screen mobile devices (the iPhone and the Palm TX) just for reference:

Yes, the Palm Pre's screen is smaller than the iPhone's, but the whole device more pocketable due to being narrower and shorter overall. So, until we figure out how to pack a 20" display into something you can drop in your pants pocket, there will continue to be this compromise between screen size and overall dimensions; we want one to go up and the other to go down, and borders can only get so thin.
For another take on screen specs, check out my recent post: Mobile Device Displays: A Few Words on Pixel Density


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