They break records everywhere (including the contested markets you keep going on about) and you see nothing but problems. I give up on the sales stuff dude, you're off your rocker there
In terms of the Steam pad, I think you're assuming too much in terms of the market and users shifting to suit it but I guess time will tell. I haven't used one personally so I don't feel like arguing for pages about it, I do however see it easily being a sticking point for many users.
Reguarding exclusivity I think you miss my point, no one goes to the store and says "Man i really want to buy a gaming system that only runs 1/3 of the software in this store". Going there to buy halo or other exclusive software is a problem they created in the first place, if it goes away you don't think consumers would be happier?
Of course people would be happy being able to run everything but no platform does so people instead choose based on the games that appeal to them.