There are lots and lots of stories about the ubuntu phones.
at least for me they could be an iphone killer.
there is an excellent article here that explains a bit more.
I love the idea of having a phone powerful enough to be an actual pc.
for me it would have to be pretty high spec though, so it might not work as well at first, but hopefully in the future (I can imagine a 64 core arm chip with 1tb flash storage and 128gb of ram in something the size of a phone before long)