The FCC seems enthralled with the possibility of WSD's opening up a new "Wi-Fi on Steroids" network, since Wi-Fi has been so successful, but the range is limited.
So, with the "promise" of "long-range Wi-Fi," the FCC wants it for "Mobile Broadband," but WSD's aren't part of the 500MHz they also want to reclaim for Mobile Broadband.
Other applications I've heard about include wireless utility meter reading machines. So, it could be anything I'd guess:
- Remote controls - garage door openers, car doors, etc.
- Consumer weather station links
- Radio controlled aircraft and cars
- Home electronics control (lights, plugs, sprinkler systems, cordless phones, etc.)
The problem is that TV Band spectrum is scarce in the areas that need these devices most and long range Wi-Fi applications mean more co-channel interference.
- In some neighborhoods, it's easy to see 10-15 Wi-Fi networks with a stock antenna over the 11 available Wi-Fi channels (~70MHz).
- Imagine if we instead are competing with 500-1000 neighboring networks over ~18MHz in urban areas?
Someone (the FCC) forgot that longer range generally means that bandwidth is sacrificed, not enhanced. So, we may indeed have long-range, unlicensed Wi-Fi devices, but don't expect them to work much better than an old dial-up modem.
In sparsely populated rural areas, better performance can be expected, but there's no real shortage of bandwidth in such areas already and infrastructure isn't getting built.