Great set of criteria -- I appreciate that this is much more broadly applicable than the narrow spectrum of web startups typically discussed here. Sounds like you've gotten an MBA from the school of experience (the best kind!).

Only other criteria I would add is (1) if your business and product have a substantially lower cost structure than whatever they may be replacing, and therefore can get traction at the low end of the market (not that premium never works, it's just tougher, in my experience) and (2) your product can be bought with existing institutional market processes (meaning, it does not take a lot of behavior modification for people to buy your product -- whether it be corporations who don't yet have a buyer for your category, or if it's an entirely new way to buy a category, it makes it much tougher to get traction).