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Off topic, but hopefully there are some wireless guys in this thread who know the answer: Whatever happened to 802.11ad? Wikipedia says the spec was approved in 2012, but there's pretty much no products on the market.

It seemed like everybody was rushing to get .11n stuff on the market, even before the spec was finished, (draft-n, etc) but nobody's building .11ad radios?

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Do you mean 802.11ac? Many new radios use 802.11ac[0], although maybe the rush is smaller than that for 802.11n. 802.11ad is a 60 Ghz protocol, a different frequency than 802.11n or ac use. It looks like 802.11ad would mostly be used as a sort of wireless USB or HDMI, [1] not networking, because it doesn't penetrate walls.

[0]: https://en.wikipedia.org/wiki/IEEE_802.11ac#Products

[1]: http://www.cnet.com/news/60ghz-tech-promises-wireless-dockin...

What is ad good for that would justify the additional cost?

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