John T
I don't think it's all that cynical a move myself; I think it was just inevitable after Apple did it for both OSX and iOS. And then there's Android on phones and Chrome on netbook-type things. The idea of going to a shop and handing over cash for an OS already seems kind of archaic.
Increasing market share sells other applications, notably server side and cloud based facilities with Microsoft. They are shifting towards tablet computing and they are obviously taking a different approach after a false start with Windows 8. I think their vision is that adopting Windows 10 might want you to eventually adopt Windows on tablet PC's and phones.
They appear to be adopting a more open source
mentality just like Cakewalk has done under Platinum, that is directly listen to users rather than keep discussions internal. MS traditionally have kept most things under wraps with their MVP programme, it looks like the barriers have been lifted. It seems apparent that MS and Cakewalk recognises that in order to keep your customers you need to engage with them nowadays, it also helps improve their software. It's a lot more than a charm offensive, it's a philosophy that has it's roots in agile development. They are attempting to sell you a lot more than just a product, and are attempting to plough your feedback straight back into making a better product.
This is probably something that would have been difficult to do years back, power users weren't as easily accessible or frequent (and probably didn't communicate half as well as they do nowadays).