B-ch4n
Minecraft was not originally a console game, it's been franchised like a number of other games. The pocket edition as you call it, is a app game not related to the rest of the Minecraft games, it's fairly new and is a very bad representation of Minecraft. I wouldn't even consider it the same game, it has no multiplayer and has less features than the first version of minecraft. Minecraft is primarily a PC/MAC based game, it's been expanded for the consoles like many other favored titles have.
I know it wasn't originally a console game. I also know that it started out on PC/MAC though people wanted it on consoles and iOS/Android and I know that it's not as massive as it's predecessor. Which is understandable, considering how limited consoles and tablet devices are against PC's. The Xbox 360 Disc can't hold as much as the PS3 Disc and I'm pretty sure it's never going to be up to par with the version that's on PC/Mac.
I bet they could have gone all digital and then pretty much put all the patches/updates but that also depends on a pretty big hard drive which consoles don't have and the amount of time it would take to patch/update everything. So it's pretty much a double edged sword. The Pocket Edition isn't what I call it, it's what the developers called it, when it was first released It actually does have multiplayer but it's only local.