It isn't a very good exit. Boxee always painted themselves into a corner. They're the streaming device that could never achieve enough scale to gather content relationships.
It was a great device, but plagued by the anathema that is content partnerships with modern media companies. No matter what, if you have to provide consumer content, you're gonna get fucked. Plain and simple.
This is why I fully expect an advance in streaming media to come from a business with another form of revenue (Apple, Google...).
The content companies are intent on smothering any startup with great ideas, because it's a huge threat to their current business model. Like Apple did with iTunes, it's going to take a great idea and a company with a serious war chest to force progress along. Good technology alone is just going to meet this same end, time and time again (in my opinion): Comcast, Verizon, etc. have too much of an incentive to keep things the way they are now, and enough money to keep startups from reaching critical mass.
Edited to add:
In a lot of ways, Microsoft might be the first to really break the barrier with the XBox One. They have loads of cash, an audience that the content creators / content delivery companies need and the technology to get it there.
