My objective is to build an application which uses the gpus processing power as in parallel computing,eg. joining large images together on a cellphone itself.
* No common task should require more than 3-4 keypresses you can easily remember. Arrow keys count. Corollary: navigate the menus with the number keys; shortcuts, ...
* Incremental search to look up contacts with (like emacs C-s)
* Operate without looking. In particular, there should be a way to get to "home" from an arbitrary state, options have a "return to default" key, all important menus stay the same, anything common/important can also be done by keyboard.
* Typing speed. With slow input, calendar functions etc are nearly useless. Unfortunately, the fastest solution, qwertz keyboards, still sell at a premium. Perhaps there is a way to optionally emulate a chorded keyboard on standard 12-key hardware? It should have some form of visual feedback enabled by default, like Apple's keyboard overview.
* Reliable Sync. Even with 348 contacts, 1000s of appointments, international characters. The point is reliably correct - everything I have had so far has messed up eventually.
* Todo list and calendar 2 taps/clicks away, such as for a shopping list
Besides, I'd like some gimmicks:
* Adjust lighting / color hue / contrast on images, cut them down to an image section. Cut videos to save space and improve art.
* Easy file sync, regardless of file format
* Track location over time and tag photos. Even if there is no GPS hardware, cell towers broadcast their ID (or location), and modern phones have an acceleration sensor.
* A 3-touch way to keep track of my money / time.
* Office to go
* Flashlight mode. Display lighting is usually bright enough to find the key hole, stuff I have dropped,...
I admit you asked about computationally intense applications, but this is what bothers me most about my gadgets.
It would probably work best in places with good public transportation, or other reasons for people to be in relatively close proximity to each other. Then when a good match was within X distance, you'd get a notification saying a match was nearby; and if you both had a minute you could meet RIGHT NOW.
Another TV inspired phone app (Fringe) could listen to a phone dialing numbers and turn around and call the number for you, based on the tones of the numbers in the phone number. Cool.
* Honestly I'd be happy with a good enough approach here. Just recognize whatever words it can (even 10% or less) and show the google translate translations scrolling down my screen. If I can just discern the subject of a conversation once in a while, I'm still way better off than understanding nothing.
twaudio? tweaker? ugh.. I had naming things after popular web sites.