None of those missteps are on their core products. I'm talking something like Xbox 360's 33% failure rate (which doesn't even seem to have damaged their brand at all, surprisingly).

At this point, their brand is so strong, you'd need something huge...I can't even think of anything besides serious failure rates on iPhones or iPads.

Apple TV is doing well for a "hobby" compared to Google TV. and Ping's failure is not hurting Apple at all. Amazon however, does not nearly have as much cash and resources as Apple or Google. if Amazon fails in this it can potentially hurt their bottom line.