I know it's not feasible at present, but I'd like to imagine a smartphone that I could consider a high end professional tool. A device like that needs no software or UI changes outside of an occasional patch; hardware fast enough that I couldn't imagine a need for replacing it. A Thinkpad or Nikon, and just as much an extension of my person. Like vim, using the device would feel a bit like playing the piano--something I bend and mold, that also bends and molds me.
I'm not at all satisfied with this stuff yet--not to the level I described. Currently these phones are indespensible (much like trips to the dentist), but what I really want is for them to feel like an extension of my soul (like a fine car). Things are too buggy, too consumer, and moving much too fast. I imagine we'll eventually hit a plateau, because I want that phone.