Most wireless HDMI kits I’ve seen rely on protocols other than WiFi (they’re sold as paired transmitters and receivers that aren’t designed to interoperate with other devices you own, so the protocol doesn’t really matter anyway) and prices have come down to around $120 USD, I believe, with quite a few readily available on Amazon. They add some latency, and many of them are very short range, but otherwise they work fine. I set my father-in-law up with one a year ago and it’s been working great for him. As Josh said, I wouldn’t use it for gaming, but for hooking up media playback devices (e.g. Roku, cable box, etc.) it shouldn’t be a problem.