Gigabit Wi-Fi may be a thing of the near-future, with plans to bring it to the public before the end of this year. Unfortunately, the standard will be for use inside a single room only, as the signal won't be capable of penetrating walls.
The "cable-free living room" exists in the same futuristic space that holds the "paperless office" and the "coherent tax code"—and we'll believe in all of them just as soon as we see them. But a new consortium called the Wireless Gigabit Alliance says that it can help make the cable-free household a reality within the next few years by providing a wireless gigabit spec with enough bandwidth to transmit HD video.
The plan is like WiFi on steroids, and, just as with steroids, wireless gigabit comes with some serious drawbacks. These (fortunately) do not affect the gonads or cause 'roid rage, but they do mean that you won't likely be using wireless gigabit to transmit through walls. This is an in-room tech only, and therefore not a full replacement for the various WiFi specifications.