Both of those frequencies present problems, particularly 60GHz which would have extreme difficulty penetrating walls or even paper. Still, the group sees their next project as a good way to proceed from a/b/g/n.
Will Wi-Fi catch up to wired? Not likely, or at least not likely soon. By the time any wireless spec for data transfer reaches current wired speeds, wired speeds will have increased even further. It wasn't that long ago that 4Mbps on LANs was considered fast, and now that would be incredibly slow even for a wireless connection. It was nearly four years ago when Gigabit Wi-Fi was first discussed, following the FCC's considering of letting the high-frequency 56GHz band. Hopefully now it won't be another four years before this new standard comes to fruition.