I am of the belief that if you are trying to increase your productivity whilst mobile with small/light stuff, nothing weighs less or takes up less space in your luggage than some touch typing training software.
I can’t believe that there are people who type as much as some of us do who haven’t bothered to learn to type. It’s an essential skill.
Putting my Magic Keyboard on my lap was much better, but without being able to see, I couldn't type well.
Spent 10 minutes a day over the next couple weeks learning Colemak (easier than retraining myself on QWERTY). Being able to touch type numbers is great while programming.
Touch typing + bluetooth keyboard + VR headset = insane productivity potential.
I like its compact design (it fits in a pocket), and it's very satisfying to fold/unfold :] That said, I don't use it that often because I find smartphone screen sizes too small.
I have the iPad Pro with keyboard cover and I keep it in my bag most of the time even when I don't have a laptop, so that's the standard I'm trying to beat. It would be nice to have something I could pair to my phone (the largest phone Apple sells) to use a terminal when on the go, but I guess I'll just keep carrying my handbag with iPad for now. I hear Apple is going to improve the iPad Pro's keyboard this year.
Oh well.
Couldn't you just render the keyboard (+ finger positions I guess) inside the VR.
RE headset size, I agree that today they are much too bulky. But they are still good enough to "live in the future" and get serious work done in.
If you have an HTC Vive/Vive Pro/Valve Index, I can help you install Simula/give it a try. Contact me at george.w.singer [at] gmail [dot] com if you're interested.
But I don't know about "significantly underrate" either. The screens in the video you linked are 93x44 characters. It's certainly usable, but just my main screen holds 8 windows that size with a generous font and room to spare.
In a generation or two when the headsets are lighter (can be worn for a day without leaving an impression on your face as the current headsets do) and higher resolution (can actually replace a multi-monitor setup in number of pixels), I strongly believe this is going to be a killer app that could easily dwarf the gaming market for VR headsets.
An interesting corollary of this is that now is probably a good time to start researching novel input devices, since there is an opportunity to create a completely new UI; if you can touchtype fluently then VR works fine, but if not, it's going to be challenging to use.
As an example, Facebook is working on direct neural input devices:
https://www.roadtovr.com/facebook-acquires-ctrl-labs-develop...
And I have had interesting conversations with neuroscientists about a bunch of intriguing ways that you could hook up an input device to the somatic nervous system. For most of these you'd need to learn a different set of "movements" than typing, so perhaps there's not an immediate win vs. just requiring users to learn to touchtype, but the benefits of being able to "type" characters in a UI without a keyboard are pretty clear.