Froyo 2.2 platform comes with a lot of new features for user interface, performance improvement, security, even more. But there are many things really cool about the user interface, internet communication, and gaming performance.
1. Home screen
added 3 quick access button to easier navigation for dialing calls, Navigating main menu, and web browser.
2. WI-FI Hotspot
Connect to internet through WI-FI hotspot directly from your device. it’s really cool when you want to connect to internet from you laptop and you can’t find a wireless network near you.
3. Graphics improvement
OpenGL es 2.0 supported and ETC1 for texture compression. that’s really improved gaming performance and multimedia files playing.
4. Bluetooth enhancement
supporting dialing over bluetooth, sharing contact informations, connecting fixed docks, and headsets.
check the full features and enhancement about Android 2.2 Froyo in this link