From what I can see, it looks like smart TVs and smartphones have been compromised.

The infosec community's been loudly yelling about the terrible security for IoT devices for years. People buy them without paying any heed to the security of them. Buyer beware? :)

PCs, Macs, Linux machines might be compromised too, but that's more fuzzy...

They are, of course, by the CIA as well as every other well-funded group on the planet. There are markets where these exploits are traded.

I hope antivirus companies can get on this ASAP.

AV software won't help you when your OS or firmware is compromised, sorry.