I would love to see some sort of sharing of settings, favorites, etc when using multiple ATVs and iOS devices with the goal of creating consistency across all the ATVs in a house. It would be great if favorites were also shared with the DVR app.
Having the option to sync manually or enable automatic syncing on a per-device basis would be pretty cool too. That way we could, for example, sync the favorites on all ATVs in common areas in the house, but those in bedrooms could have their own unsynced favorites list. But then maybe the bedroom ATVs could pull in the favorites from other TVs as a starting point, but still not sync changes in the background when that list is modified. I could see this being very useful for DRM channels too, which I hide for obvious reasons.
Probably not a super popular request, but it sure would be nice…