The most neat for me in the NXE, aside from the avatars (which aren’t really useful) is the ability to queue downloads on the LIVE marketplace. I can surf to whatever I want to download (usually free), like a trial or a demo, and download it. The next time my Xbox starts up, it automatically downloads my queued downloads. This is great if I’m surfing around and finding out about new things for my Xbox.
After living with this feature, I kind of miss it in other products. iTunes can easily use this feature, since it is already account centered. If I choose to buy a song in the iTunes store, why can’t I have it downloaded to all my machines that are authorized? Apple’s not leading the way here.