Windows phone has more potential than any other phone OS right now. Microsoft is marketing it terribly, but that is changing as Nokia is ramping up.
Try out a Windows phone and you'll see what I mean. It's refreshingly different from the usual iOS and Android fare. And it's not just different for the sake of being different; it actually makes sense.
I played with a Nokia Luma 800 yesterday and I must admit I was a bit puzzled. What's with the sliding cubes? To me it felt like a step backwards. The phone's specs were nice, for sure (great pictures and a snappy response time). But the OS ecosystem left me with the impression of being spatially disoriented. The tiles are neat, but it's not really what I want. Anyway, we'll see what the general public thinks when they become more widespread.
So, as you said, back to the "failing" iPads...