I'm glad to hear that you're having a good experience on WiFi! The provider in question is using FHD, high bitrate streams which are identical to cable TV. I've tried it in several locations, and none could cut it, not even on an AC network 8 feet away. Latency to ISP is les than 10ms and I roll my own gateway/router on an old PC and can almost max out wireless N throughput.
But keep in mind that we are likely not talking about the same provider. WiFi worked okay for me with more regular IPTV servers. So I do mostly agree with you, because most of all providers will work fine if it's in decent range. If real HD streams become commonplace, a lot of people are gonna have problems using WiFi.
Even if an AC network would solve it, in the event the OP doesn't have an AC router, he would be forced to upgrade to one, which makes it more pricey for a feature that may turn out to be flaky depending on his/her specific setup. WiFi is one of those things that's quite tricky to get "just right" and depending on other factors, could make a good fast connection near impossible.
Tester798, is WiFi an absolute neccesity, or more just for convenience?? Also, do you live in a condo/apartment where there will be lots of WiFi interference? That will greatly affect WiFi the experience. If you don't require the WiFi , you can save yourself a fair chunk of change, and get yourself a few months worth of subs!
Cheers