As Average Joe said Live Wallpapers are actually more cool then than the gimmicky concept would suggest. I love them and can see them evolving into an art form. They are definitely a worthwhile enhancement

The big plus factor is Flash, not that I am a fan of Flash and probably agree with Steve Jobs.
But Flash is incredibly ubiquitous and it is a nonsense to be deprived of access to it. I don’t care if Flash becomes obsolete in the future but it should be incorporated now. So when it is finally part of your device you get a sense of completeness which is justified.

Now I can watch BBC iPlayer broadcasts, to cite one major example.

Many apps and their significant upgrades depend on 2.2 Froyo so I no longer have my nose up against the shop window wishing for something I can’t have.

There may be other benefits to Froyo that I am unaware of and I am happy to be updated.