3D Printers, which must have seemed like a sci-fi fantasy only a decade ago ("Earl Grey, Hot"), have gone the way of so much technology, and are now no more expensive than a laser printer.
This recent Businessweek story says there are now models available for as little as $1200.
I did a trendwatching report for a client a few years ago and told them this would happen. Not because I am brilliant (I so wish this were the case), but because all things flow down the food chain over time. Something only available in jet planes today will be available in your car in the future. Innovations cascade from the most exclusive markets to retail markets. GPS was a military creation, then it was a commercial thing, and now we all have it.
At a copy shop near you?
I have a prediction for you now -- just like copiers and printers before them, it wont be long before there will be a 3D print shop near you, perhaps in a corner of the Home Depot (that's where I'd put it, anyway) or perhaps in Staples, or in Kinkos. You'll be able to rent time on someone else's 3D printer instead of having to buy your own. You might be able to get help building your 3D digital model to feed to the printer. They might have 3D scanners where you can get a scan of your broken widget to reproduce (say, an broken part for an appliance that you want to repair.)
Make your own app
The apps look to me a lot like a personal portal of sorts, where you can track sites, rss content, and similar things that have been built elsewhere. (I can't build a game this way. Not yet, anyway.)
For the creative human -- which is essentially all of us -- times could not be better.