AnTuTu is one of the premiere full system benchmarks available on Android devices. The developers claim to have over 100 million users, and they're all getting a big update to version 4.0. Not only does the new AnTuTu look better, but the way it determines scores has been tweaked to better support faster devices.
AnTuTu is quickly becoming one of the most popular benchmarks on Android, and for good reason: the devotion of its developer to providing timely updates is admirable (even if his talent for GUI design isn't... at all). The bump to version 3.0 brings a host of major changes, including a brand-new OpenGL ES 2.0 3D benchmark, along with a new 2D benchmark specifically for testing (wait for it) 2D gaming performance.