Now that I've read through all of his predictions, this is part of a larger trend among them. He calls his predictions a success when the technology problem has been solved, and he is completely ignoring that forces that decide if that technology becomes common or not. He is very bad at thinking about the human factors, and optimistically calls success for things that saw a brief life in the market, and then was pushed to the sidelines.
Take force-feedback in games. Ten years ago I could go into any videogame store and buy a lot more different kinds of force-feedback controllers than I can today. It was tried, and then everyone got bored.
Or his prediction that everyone will have several wearable computer devices on them. Yes, we can do that today, but noone is doing it, because the more devices you have, the more often you have to recharge them. This is why most people consolidate their wearables to one smartphone that they charge every night, rather than ten devices that have to be charged each on their individual schedule.
Or voice-recognition input. Yes, the technology is there, but is is not, and will probably never be, the main input mode for our computers, because it is incredibly annoying in any group of people.
Or his prediction that cables are disappearing. This prediction will not fully come true until we solve the recharging problem. I have a colleague who recently bought an ordinary wired mouse to replace his cordless mouse, and he said it's the best thing he bought for his computer in ten years, because it always works and never runs out of power.
Or his prediction about animated virtual personalities. Yes, I've seen those at a bunch of websites, but less and less these days as people realize that they're just in the way. What people want is an efficient search function where they can type whatever they want and get relevant results.
He also has a bunch of predictions involving virtual reality which are all pretty off. World of Warcraft has over ten million active players, and allows people to interact with each other in the virtual world of Azeroth, and yet a lot of people play it in internet cafés or at LAN parties, they play it with their friends next to them, because the physical experience is so much better than the virtual one.
It's also pretty telling that if you look at professional video game players, they are constantly rejecting reality-like immersion. The best first-person-shooter players are all using the lowest graphical settings, and a distorted perspective, the best world of warcraft players do the same, play with no sound, and have lots of addons that expose as much of the underlying mechanics and numbers as possible, which is completely contrary to the goal of immersive systems.