I'm very excited about what we have already been told. Bigger worlds (36x's bigger), better multiplayer with more people, new hostile water mob (that has been needed for a while). But the number 1, 2 and 3 on my wish list is better anti-griefing tools. Like property zones where only the player that owns that area can manipulate blocks mine etc.
After actually playing the XB1 version of minecraft I'd say they need to remove something BEFORE they add anything... the new auto-save feature is complete garbage (worse than garbage even because garbage simply doesn't work, whereas this actaully causes damage) and that combined with other bugs, that under other circumstances could have been acceptable in the short term (IE, is the results of the bugs weren't constantly being saved or causing things to be deleted then saving things being deleted; meaning you can't go back to yor save to do it again without getting affected by bugs).
at this point the game would be substantially improved just by the deletion of the auto-save fuction or bringing back the old auto-save that was is the game that actually did work properly,
@sal i'm pretty sure the XB1 can accomadate all you family members on 1 master account using only 1 XBL membership, and i'm pretty sure each sub-section of the account can be regulated deiffently IE kid 1 can play E rated game kid 2 can play T rated game and you and your wife could have unregulated account.... i'm not entirely positive but i thinkthis could also be don on the 360 as well, at least to a limited degree