This looks really interesting, but I'd love to hear from someone knowledgable in the physics of terahertz radio waves. There are often trade-offs involved with the frequency you choose. For example, 2.4 GHz just happens to penetrate common building materials (reasonably) well. The 5 GHz spectrum for 802.11n doesn't work as well in many cases.
It's the good news, but the actual working chip is 1.5 Gbps, and 30 Gbps are planned for the future.
... and production is 3-4 years out. So cost, speed and availability predictions need to be taken with a large grain of salt.