60ghz (Added by 802.11ad) can't penetrate sheetrock effectively, let alone bother your neighbors, a much smaller distance than 5ghz (which has half-solved the dense urban environment issue on it's own, but not completely; the article overplays issues significantly).
I support abandoning 2.4ghz for Wifi and anything else that is high bandwidth. The good news is, the 802.11 Working Group and the major Wifi impl manufs agree with me, which is why 802.11ac is 5ghz only, and 802.11ad is 60ghz first, both of them removing 2.4ghz for anything but 802.11 b/g/n legacy connectivity.
Also, as a side note, I want the FCC to ban the LTE-over-5ghz plan. 5ghz is ours; they can have 2.4ghz, we're done with it.