Seriously, the AppleTV is only a 'failure' by the standards of the iPhone and iPad -- most companies would love to have a product that sells nearly 3 million units per year! The margins may be lower than the iPad's, but my understanding is that it does still make a decent profit.
Thunderbolt is an Intel technology and an incredibly useful one. The available products are already starting to look impressive in functionality and prices will come down before too long; Apple themselves use it to provide gigabit ethernet on devices that are about the same thickness as an RJ45 connector, and they sell those for just $29.