Looking for an "immersive" niche market? Might I suggest underwater digital photography?
As any casual diver will tell you, using the new generation of waterproof cameras, like the Pentax Optio W30 ($299), can be a chore. Framing images properly takes up one - or both - hands, which you sort of need when you're swimming.
Well, tiny Sacramento, Calif.-based Liquid Image (formerly Zocker Toys) has come up with a better way to get those precious underwater keepsakes: Place a decent still- and video-camera inside a diving mask. Hello, Underwater Digital Camera Mask. Liquid Image founder and president Kurt Pearson says he got the idea trying to take good pictures on vacation. He insists just about anybody can be Jacques Cousteau with a little bit of practice.