I agree with the mentality that touch = consume and type = produce. The efficiency and imtimacy of user interaction of keyboards is simply unmatched with other competing input devices. Open-ness of platforms is secondary.
I have quite a few lawyer and doctor friends who use tablets first (usually with a BT keyboard) and only break out the computer when they need it for some very particular reason.
If you don't need root on a beefy machine and/or Windows-specific software, then a modern tablet with a bluetooth keyboard gives you more than enough compute and all the applications you need to be productive. Often with a better UX.
It's an every-field-centric viewpoint. Every field that creates something is more efficient with a keyboard. You even just supported this point yourself.
