Nem on 12 November 2015
No one.
It would be incredibly risky and probably unrewarding to do it. The ammount of investment and development resources necessary to aquire from scratch make it a huge investment with no garantee of sucess.
Only a company going in a craze would do that. So, i dont see ayone besides Amazon and Google even thinking about trying. But, i dont think either one has a chance unless someone else exits the market. That was what benefited Microsoft aswell. The exit of SEGA from the market.
Theres hardly room for 2 manufacturers and we have 3 already.
I did notice the sugestion of Valve. I guess it would be the closest because they already got the infrastructure and some development power. But, i still don't see why they should risk all that.
