Apparently the co-founder of Id Software is ready to cash in on that idea:
John Carmack's hobbies probably aren't a lot like yours.
He spends two days a week building rocket ships. His idea of a getaway weekend consists of holing up in a hotel room and writing programming code. And he likes to speculate on worst-case scenarios for the video game industry (and believe me, this guy can envision some scary stuff).
These days, though, cell phones are his primary hobby - specifically making games for them. It started as a lark, he said, but it has become something he quietly hopes will revolutionize gaming.
"We're probably going to have a sequel to 'Orcs and Elves' but I'm really into the idea of a massively multiplayer cell phone title," he said. "I have absolutely no interest in going and competing with Blizzard in the high end of that market, but a cell phone version might be interesting."
If by "interesting", you mean "cataclysmic", then you are correct.