I wouldn't call the high-end Android market saturated. There are a number of players, but it's a market of compromises. If you want a stock Android experience, you go away from Samsung. If you want a headphone jack, you go away from Google and OnePlus, etc.
The Surface range is good because it packs so much functionality into a nicely designed package. The same design principles, with a full feature set, would sell like wild-fire, and would put a lot of other phone manufacturers on notice.
