The thing is Sony and MS are not in the industry to make software easyer better and for more kinds of people.
They are 3 very diffrent companys with 3 very diffrent agendas. Sony and MS have no branch that inovate for Software to expand there market. It may make one but always will remain a after thought.
Nintendo as a Software studio Is the exeption to this. they see it as. if they can sell easy and cheap software to new 100 million costumer userbase it will have succeded, to expand the market they always have been in.
Dont expect Sony or MS to make anything other then copy cats of Nintnedo. its not why they are in this bisness. Could they change this. YES. Sony and MS can start Devloping and Inovating. but it see's this as more of a money sink then Nintnendo, so Nintendo will always make a bigger effort of it.
I see MS going this route. Natal looks very much like they want to open a Devlopment and inovation section in the company and Fund it with proper cash for results.