Second this with my WP preference. I have a device for the major platforms, but my WP experience is better than the others. It's more intuitive and has is already where the others seem to be trudging towards, in terms of content first. The consistency across apps and within the platform make for a cohesive experience that is moving closer to being seamless with the desktop experience.

I don't know if I would suggest they can get on top on phones, but they are definitely putting forth a very strong proposition for everything down through tablets.

If they can get just a big chunk of enterprise-supporting apps along with the top non-game apps over one way or another, they'll have carved out a sustainable chunk of the pie. This along with their casting of bread and butter like Office onto Android and iOS gets them into an enviable position going forward. But, it's a massive slog to get mainstream consumers to retrench when we aren't looking at something similar to the difference between a Blackberry and an iPhone.