That is my analysis of their behavior. It's quite possibly wrong (though I don't think so.) What it isn't, at this stage, is provably false. You keep acting as though saying "no, you're wrong!" is proof of same, and if I disagree then I'm just not objective enough, but that's not how it works.
Your statement about Microsoft trying to force you to use windows store apps is provably false. I've been running Windows 8 for a while now and they have never once tried to force me to use it.
You could argue that while they haven't done it yet, you think they will do. But then you're not analysing their behaviour, because they haven't actually done it or even hinted that they will. You are only analysing your guess of what their behaviour will be,
My analysis of your behaviour is that you're scared that if enough people prefer apps from the windows store that there is no business case to develop desktop apps or for Microsoft to support running them, then you'll be left without an operating system that you like.
"Paranoid thinking typically includes persecutory beliefs, or beliefs of conspiracy concerning a perceived threat towards oneself"
or the developers who are now going to have to fork out to Microsoft just to be able to distribute their software? NO.
I'm a developer and I can distribute my software without paying Microsoft. If I chose to write a tablet app for Windows RT then Microsoft do have a monopoly for distribution, like Apple do on the iPad. However with Microsoft testing & hosting the app, taking payments then sending me my cut, it sounds worth paying for. If there was more than one store, then I'd need to get my software on all of them as the more stores there are the less likely it is that users will visit them all.
It doesn't sound great for open source who want everything for free, but someone has to pay. Even free hosting for open source projects has to make money somewhere, usually from people who don't use the open source software at all (like advertisement, where it's the customers of the products advertised that are saddled with the cost).