In ethernet form (copper) 1000mbps (which is 1gbps) is as fast as you get.
You can go full fiber optics in your home and get 10gbps but you will pay thousands of dollars between the switches, running the fiber to computers and the fiber optic nic cards.
With only select cities having 1gbps (1000mbps) internet connection, hard drives only being able to write marginally faster then 1000mbps and media streaming not requiring anywhere near that bandwidth (true blu-ray streaming uses at most 35mbps), there is just no demand for more then gigabit speeds in homes or small businesses