.. Except for availability.

Up until a couple of days ago, it seems neither did the MK802 (not sure it's available now ...)

And within 3 months, RaspPi's availability is supposed to be mostly solved as well. I think the wait is more than worth it for the echo system that it has and is collecting in the meantime.

It seems the Raspberry Pi's standard audio out is noisy, low bitrate, basically unusable for music.