Never heard of this device -- thanks for posting, OP.
Getting two video channels to any PC on a home network (through the router) is a great thing. But that begs the obvious question, why not make it with an HDMI port (for AVR input), and maybe throw in a remote a la the WD streaming player? All it would need then is a little flash memory and, viola! It's a two-channel DVR!
With no HDMI output, the HTPC would have to always remain on just to receive streams from other PCs on the home LAN and send to the AVR.
So, not exactly the right gizmo for me, but getting closer to the holy grail of home A/V, a cheap, fully functional, subscription free, two-channel DVR.
You need to do more research on this.
It is meant to turn you PC into a DVR and then some. Google: Windows Media Center.
Edit: Was $50 from Woot last week for a refurb.
6 TV's in the house with Verizon FiOS and we only pay $4.99/month to connect all 6 of them. Thanks to Ceton InfiniTV and Windows Media Center.