Well you’ve said it yourself, Microsoft are trying to remove that physical limitation to accessing a platform. But Microsoft knows what the market wants, people have been against exclusives for a long time and they want to remove that, I shouldn’t have to spend £300 to play a game when I have equipment already capable of playing a game Infront of me.
So being scared that Xbox is going to disappear is stupid, the consoles might, but Microsoft has been transforming Xbox into a platform for years, starting with the release of windows 7 when they introduced XboxLive for windows alongside halo 2. This has been a long term goal.