Tech pundits are not very good windsocks for what people actually want. Remember the launch of the iPod? The iPhone? The iPad? Android? All were predicted to imminent doom. It's especially hard when salesmen are telling people what they want.
For the record, my name is Freeman. You now know someone who owns a Windows Phone. And when I bought it last year, the salesman at AT&T flat out refused to sell it to me until I called a manager, convinced I was making a huge mistake.
And of course you don't know anyone who has purchased a Windows tablet.
Yes, maybe after 10+ years of having negligable market share Microsoft will suddenly pull something awesome out of the bag and people will suddenly forget about the horrible experience of using Windows on the desktop, and start wanting that on their other devices.
But I doubt it. The most surprising thing about this story is that mozilla care about it.