That's true. I so wanted to like the Windows Phone. I bought a Lumia 1520 and it was a beautiful piece of tech. And I like the default interface of the home screen (Metro works on a phone, not on desktop imho).
But .. then I tried to use the store to get apps and it was a desert. Or the things I could find, worked poorly.
That's the thing, it might well be on "mum's (next) tablet" (probably not phone).
There's a raft of really cheap (7/8/10 inch) Windows 8.1 tablets that are price competitive with their Android equivalents. At the moment they are running full Windows with an Intel Atom processor. From what I've read, these will all be capable of being upgraded to Windows 10 when release.
Spartan is going to be released for both Windows Phone 10 (or whatever they are calling it) in addition to Windows 10, from what I've read.
But .. then I tried to use the store to get apps and it was a desert. Or the things I could find, worked poorly.