I don't know about impressive, but for many people it's overkill due to the distance they sit from the screen. The pixels are indistinguishable at normal TV viewing range.
Apparently at the standard US viewing distance of 9 feet you need a 46" TV to resolve the detail in 720p, to resolve 1080p detail you'd need a 69" TV set.
Haha! Exactly what I needed to offset the nag fest I got this morning from an HD snob for not investing in a Blu-Ray setup only a week after upgrading from my 32" tube.