Yes, this has been on sale here in Japan for about 6 months. I can't speak for the whole country, but the local flying clubs have been noticably moving away from JR to Futaba, claiming better reliability and innovation. The serial bus system promises a quantum change in radio control systems, with intelligent transmitters, servos, and receivers. At first it is benefiting the helicopter and aeroplane users, but these advances will trickle down to the car and boat users.
Have to point out that this sort of research and development is expensive, so don't look for any innovations from the cheap Chinese knock-off makers. Advances will be made by the reputable, established manufacturers like Futaba who charge more for their products, but invest the profits in research and development. Chinese R&D is, I'm afraid, an oxymoron.