Originally Posted by NicksGarage
I believe that's a Sense thing left over from Gingerbread. From what I remember before updating to Honeycomb you could see the edge of homescreens on either side. Now you can't see them unless you start to swipe the screen a bit. It's handy to be able to just touch the edge of the homescreen to change.
Yes, very nice feature and I hope HTC keeps it in future Sense implementations.