Hmm...first, 11ad runs in 60GHz so it is irrelevant to this conversation. Second, even for 11n/11ac that use the 5GHz UNII bands, UNII-2 will be left completely for use by Wi-Fi - that’s over 300MHz worth of spectrum. Add to that that the 5GHz band has low propagation due to high frequency, so unless you have a Wi-Fi…

This won’t have a “megawatt amplified attached to it”. Power output is restricted to 1W, per unlicensed band rules. Range is tens of meters.