Your post does come across as anti MS, so lacks credibility. others could write the same anti Apple sruff as well, with bugs, Flat UI, wifi, dumbing down etc
But back to the point, I feel W10 is huge. Partially as its recovering from 8, so preception counts for a lot. It fixes 8, it follows Apple's lead of integration. Cheeky how MS calls it Continuum.... The one OS to cover desktop, tablets and phones is interesting, lets see how that goes. Clearly, the phone OS is NOT the same as the desktop, its the same UI in a dekstop or tablet or phone mode. Whereas Apple has a full OS for desktop and a simple, limited, consumption based OS for the phone and tablet. The Hololens and Surfac screen are innovative, and that adds brownie points to MS, as these are Apple centric innovations.
IMO MS has stepped up from being, well, just MS, to beinga today, modern, innovative OS, unified to the desktop/tablet/phone. In many ways its copied Apple business model, so it will want the app store to push on as thats a weak link. A strong link is computer/tablet/phone/game console all meld together.
Will I get it? No, I moved to OSX a year ago, and I have my ecosystem sorted. But I see MS have made a big stride here, Id see a hit go Google as it comes down to the big two not the big three IMO