I'm not saying that people are too stupid or to believe that a Nokia X and a Nokia Lumia are the same thing. That's not what they're trying to do. Read my "year 5" scenario again. If they can get these devices into the market and have people locked into their services, then in a couple of years, when they kill of the X family, they'll have people locked in to their ecosystem and when the people who use to have a Nokia X have to leave to look for another phone, their easiest choice would be Windows Phone (which at this point will have a better Skype, Outlook, Office, Onedrive, Xbox, than Android could even imagine). Sure, not EVERYONE will make that jump and some may go Android, but the majority will go to WP.
Here, let me give you a scenario and I want you to tell me what you would do. If, hypothetically, you had a iPhone and you use iTunes for your music, used apps exclusively in the app store, used iMessage and Facetime to communicate with a majority of your friends, then Apple comes tomorrow and starts selling Macs for the same price as Windows PCs (because, remember, Android and WP are competing at similar price points) and removes the ability for their iPhones to work with Windows, what would you do? My guess is that you would buy a Mac because it was within your price point and you were locked into Apple's ecosystem. You couldn't move to Android or Windows Phone because you would have to use Hangout/Skype, Xbox Music/Google Music, and the Windows Phone Store/Google Play. If they did that, then more people would buy Macs because people would be locked into the ecosystem. That's the thinking of what Microsoft is doing.