For an enterprise environment this may actually make sense, depending on what is bundled in it. For a consumer, it does not make sense.
Not to defend MS (I hate
the idea of a subscription based OS), but $7 / mo means that it will take a little over 2 years before you pay the full price anyway (for the Pro version). If they plan on rolling out major updates every ~2 years then it will essentially be the same as paying for a new copy of Windows each time it comes out, the only difference being that you have no choice in the matter.
If you can believe MS, then they say that "This new subscription model is not associated with our current upgrade offering or applicable to the Windows 10 consumer edition", meaning home users are safe, for now at least. If they do
roll out subscription for home users I can see them doing tiered system, where you pay a base rate for the OS and a little more per month for things like office and so on. Basically the cable TV model, although we all know how much we like that.
I would love to say that if this happens I will go Linux, however Linux gaming is going to have to get a lot
“For the price of a cup of coffee and a donut per day, you can get enterprise-class security on a per-user subscription basis,” Mehdi said onstage at Microsoft’s Worldwide Partner Conference in Toronto, Canada.
$7 / mo = $0.24 / day. Where the hell is he getting a doughnut and coffee for a quarter?