Considering they never actually exchanged money a single Q (the people who pre-ordered them wound up getting them free, as did I/O 2012 attendees), it doesn't seem to be so much of a failure as it was just market research on how to do it the next time.
Notwithstanding the built-in amp, the Chromecast is a pretty narrow superset of the Q at least in terms of features.
Notwithstanding the built-in amp, the Chromecast is a pretty narrow superset of the Q at least in terms of features.