Designed as a companion to the new AppleTV. The aTVDAC is a digital to analog converter with built-in integrated amplifier. So you connect AppleTV's digital output to aTVDAC, and then connect you speakers. No details yet on output power (watt) or whether it can decode surround sound.
Problem with using AppleTV as streaming device is that it is limited to 16-bits so 24-bit files will be down-sampled. However it converts everything to 48kHz (44.1 up, 96 down), so I am not sure why Birdland's product mock-up pic above shows 44k1.