I don't like that Idea. It would be like buying a VCR and After 90days when the warrenty expires, you see a message on the TV saying: "support for this product has ended, you must purchase another player if you wish to continue". When I buy some thing I want to be the one who decides when It is time for it to be replaced, Not some money hungry corporation, that does not care about my needs, requirements, or desire. It's another attempt by Microsoft to take away another choice fron the consumer (after they killed the competitor).  What could be coming soon and is what I am fearing most is Microsoft Windows Subscription based services. 
Goto the start menu: Click on the Customer ICON and Find a program Called MSbackLASH.exe Lets fight the GIANT before they take over everything, and while we still have a chance.