The next "Real Racing 2 HD" game update will be full 1080p, 30fps, 16x9 (no black bars) on the iPad 2. The race will display (via HDMIi adaptor) on your 1080p Plasma/LCD TV, while controls and telemetry will appear on the iPad. Can't wait to run this on my 60" plasma!
Meanwhile, the current version will run with fullscreen anti-aiasing and reflections, high detail objects and surfaces on the iPad 2, but...
"For iPad, Real Racing 2 HD will “step down” to support the processing and graphical capabilities of the device."
Real Racing 2 HD dev promises true 1080p output in update | MacNN