I'd rather see the functionality packaged into the Nexus 7/Jelly Bean and offer a $50-$100 dock for the Nexus 7 that includes an audio amplifier and the same connections that the Nexus Q offers. You'd end up with way more capability for the same price. The Nexus Q should be offered for less than $100, and have access to all the same apps as the tablets to be competitive.
However, since it is running Ice Cream Sandwich, I bet somebody will add those capabilities to other devices...
IMO, the Nexus Q will be a worse failure than the Google TV.