Actually, devices like the evo 4g (which I have), have capacitive sensors that extend below the screen just like on the pre, which is used for the hardware buttons. I've tested with the browser, and the whole area is touch sensitive, not just the button spots.
Originally Posted by laingman
Also, it's worth noting that the touchpad runs webos fine with no gesture area.
And finally, once webos ha open-sourced, I don't think it should be too difficult to map the 'back' function to the back key that almost every Android device has.
Anyway, if webos ever really does come to android/my phone, I will probably pee my pants in joy. But I'm not holding my breath.