You guys really don't seem to want to engage with the issues relating to content and monetization, and how without procuring attractive content you can't build a subscriber-base big enough to support the economies of scale that it needs to really work for the content vendors. Yes, streaming is coming, but my considered viewpoint is that its not going to be in the way you think. The whole "console war" angle is total bullshit anyway because the reality is that the hardware component has never been where the money is made, its always been software sales/licensing and latterly services.
Remove the licensing aspect and you get an interesting question. Platform holders lose a lot of revenue, but also save a ton by no longer having to invest in hardware design and manufacture. However by losing the hardware you lose the element that standardizes resources, which is a very weird thing when the server blades driving the content will need specification, but who's specification does one conform to in this supposed "one-platform" world?
Start thinking about this stuff and you begin to grasp how far off it all is, and how radical a shift it is in terms of software production to consider it as more than just an adjunct to the existing model.