Eh, I could see a sort of gaming bubble on kickstarter, to be honest.
What's the value of a miniature? What's the value of an rpg? Well, it comes down to what people are willing to pay for it. It's not like a house, where you need a place to live, after all.
I could see people going along, putting lots of money into miniatures and roleplaying games that they don't get around to paint / play with, and then suddenly folks realizing that they're getting half-finished games (or not getting in a few failed kickstarters) that they're not using, and suddenly folks stop oversupporting kickstarters for minis or rpgs or both. Companies put up new projects and few people back them, maybe not enough to fund, and then we've got a number of companies who have switched away from saving money for the next project because they could get that project paid for by kickstarter. And then a few companies with low cash reserves don't print anything new for a year or so, and folks stop using kickstarter as their FLGS, and things return more to normal.
I'm not saying that I see it as likely, but it's a sort of bubble that could happen.