Sharp isn't exactly a household name when it comes to cellphones, but they're looking to change that later this year with a new 3D smartphone that doesn't require 3D glasses.
Presumably using a similar parallax barrier display like the Nintendo 3DS, it would be 3D only if you were looking at it straight on. Which isn't really a bad thing for portable devices such as cellphones, as it's rare that a bunch of people gather around one to watch something.
Of course, the other big question is just who would want a 3D cellphone. It doesn't seem like it would be much more than a gimmick, but it's possible that Sharp has something up their sleeves to make it a little more interesting. We'll see!