The new Android OS will provide USB Tethering and better support for flash. Users will be able to update all applications in a single click and also have the option to store apps on SD.
Android 2.2 will be released sometime in June and may take longer to appear on phones but HTC has said any 2010 phone such as the Desire, Droid etc will have the update during the second half of this year.
More information can seen in the videos below