I don't believe any of the hype surrounding WiFi. It's radio and in the real world it is pretty appalling and unreliable.
We recently moved into a new rented place and it has no wired networking, something that we enjoyed in our previous place.
Not sure what the specific issue is, but wherever I put the network access point, you cannot get WiFi in half of the house, with no convenient way to wire up a repeater to the other half.
We actually solved the problem with some of those Powerline networking plugs. For our situation, they're actually pretty sweet and we get a good reliable throughput, not Gbit mind, but good enough. Powerline from the router to a couple of remote places in the house and a Wifi repeater attached to one of them for WiFi coverage.