Now that remote control apps are becoming the norm on tablets and smart phones, this type of product could actually be useful.

It bypasses the analog gear in your PC to keep it digital right to your gear. You can let it convert to analog or use coax for a digital feed. A range of 40m line of sight should still give reasonable distance through a wall if need be.

Not available yet so no quality reviews out there that I've found yet.

NAD wireless USB DAC
With great power comes Awesome irresponsibility.