Doubt Nintendo would budge on there strict copyrights let alone allowing a java/flash game that's not hard-coded on any Nintendo system. It wouldn't utilize any of the 3d's functions let alone perhaps run in that evnvrioment I am surprised that they did decide to put it on Sony with the recent hacks and awesome sauce. They have said they want to get something out on the iphone, but with apple being sticks in the mud about everything they allow on the iphone sucks balls. I do believe that most of the Mojang team have Sony Xperia's and I wouldn't let it run past you if Sony kicked some in there direction as a "gentle promotional item" and if that's true they will never admit to it.
In total Sony does have the well rounded platform with controls, and system but they just aren't that popular and this is purely a marketing scheme if you ask me. It would boost Sony sales through the roof with recent events because they have "exclusive" minecraft mobile. Android would be easy to port minecraft over to since Android considering its built off of java. On one token it kinda erks me terribly knowing that this is most likely a kick back from Sony and a ploy, but on the other side of that token I know an Iphone version will be coming out eventually as stated by notch and during the seananners/machinima live along with twitter confirmations.
The even worse thing is just keep tacking on that ever so growing list of crap for minecraft WHEN IT ISENT EVEN DONE BAH!
Oh and as an side note the Xperia's is a Verizon exclusive only here in the US thats just doomed to fail before it even begins..
Verizon=

or

take your pick, end result is the same.