I've been working on some ideas about using Tor to secure "internet of
things", smart devices other than phones, and other home / industrial
automation infrastructure. Specifically, I think this could be a huge
application for Tor Hidden Services and Onion sites configured with
Hidden Service Authentication and "stealth" mode.
Earlier this year, I published some ideas on the subject here
https://github.com/n8fr8/talks/blob/master/onion_things/Internet%20of%20Onion%20Things.pdf
showing how you could use Orbot and IP Camera apps to build a
cloud-free
Tor-secured "Dropcam" style setup.