Sony is the most innovative to me ( I am an engineer myself),,not in gaming but in electronic devices like TV,,,just go and take a look at OLED TV and you see why they are innovative..
Or take a look at their flexible TV here:
http://youtube.com/watch?v=lILJdYoxuGE
now that's engineering.
nintendo is a very innovative gaming company(ofcourse in gaming only)
MS? I m not so sure on that one(if marketing is engineering then I guess yea)







