Best Apps to Show Off IP4????

Any app that takes advantage of the new Retina display is flashy. You can tell by the icons: non-iPhone 4 apps have rough edges, as if they weren't anti-aliased, iPhone 4 apps are crystal clear.

Try this list of iPhone 4 specific apps.

Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7)

Just because they have a 2x icon doesn't mean all graphics are 2x.

Gun Range

Gun Range uses the gyroscope and its 99 cents I believe.

Ocarina is a good one, and Angry Birds. And Doodle Jump