It has massive new features: SIP support, gyroscope support, NFC support in addition to the various Dalvik and NDK upgrades and APIs. Feature-set was never a p

It has massive new features: SIP support, gyroscope support, NFC support in addition to the various Dalvik and NDK upgrades and APIs. Feature-set was never a problem for Android. The UI didn't get an overhaul though, just nips and tucks, and is the only quarrel in that post. Personally I like the Android UI specially after the black/green/orange refinements in 2.3.