There will always be a gap between what's technologically interesting and what's economically interesting. Web applications stopped being technologically interesting a while back. I've seen everything from in-browser HD-video to AJAX-powered e-mail clients before 2001. After the major technical challenges had been solved the industry kicked in and started mass-producing.
Today the mobile phone platform is sort of like the Web of 1999: a technological wild west. Fart Apps can still make you rich, while useful bluetooth apps hardly exist. If that's not adventurous enough for you, there's plenty more.
I spend most of my time on vehicle robotics for automated roads (C) and divide the rest over Arduino/AVG programming (C) and VMM hacking (C/IA32). You can be sure you won't find any "rich APIs" there. Also there's no chance it will make you rich, you need to be in the proven areas for that. (unless...)
Today the mobile phone platform is sort of like the Web of 1999: a technological wild west. Fart Apps can still make you rich, while useful bluetooth apps hardly exist. If that's not adventurous enough for you, there's plenty more.
I spend most of my time on vehicle robotics for automated roads (C) and divide the rest over Arduino/AVG programming (C) and VMM hacking (C/IA32). You can be sure you won't find any "rich APIs" there. Also there's no chance it will make you rich, you need to be in the proven areas for that. (unless...)