I don't see how a seperate Minecraft for a mobile device would work, I mean I've seen myself sit and play it for 3 or 4 hours at a time - a mobile device is simply not convenient for that.
But also there is absolutely no need for a Minecraft creative mode game, Minecraft without the point. No threat, no monsters, no death, no challenge, no gameplay - but looka my purty house what I made, it'll help protek me from the... ohh.
What would be outstanding is if mobile Minecraft was just Minecraft but mobile. Like if I could play on my own server, then it would make it a whole seperate game. Maybe Mojang needs to look at the cloud, store the world data on that, then share it on mobile and console versions. I run a server for myself and my brothers/friends - and it's great, we can nip in when we want and tend the farm, or whatever - or we all meet up to explore cave networks and build XP. If I could log into that server from my iPhone, well it would be epic, it would make me interested in mobile Minecraft... but no, lets just make a piss poor creative mode game, that any indi worth his salt could knock up in a weekend, and we'll call that Minecraft PE... or Minecraft 'play once and never again edition'.
Notch is being retarded, he thinks that everyone plays Minecraft to build stuff - no, bulding is part of it, the main gameplay hook is the imminent danger outside, constantly worrying about resources and protection, trying to survive, maybe even prospering. If I want to build something pointless, then I'll buy some lego. Everything I build in Minecraft starts out as a functional project, a monster trap, or a shelter, mushroom farm - whatever it is, making it look cool is a secondary concern. I guess we all play Minecraft our own way, but the main thing is we PLAY minecraft, we don't mess around making pointless stuff.