I'm very happy with my decision to replace every multi-lane highway around my house with a congested single lane dirt road with half the speed limit.
Your analogy seems far fetched to me.
Going wired->wifi is like going desktop->laptop. I'll admit to being slow to go to both laptop and wifi years ago, but at least to me they're clearly superior.
Even with 802.11ad (that I don't have) there's a huge difference between having to plug in when you reach a "fast area" and not having to.