Underdiscussed: The biggest difference these keyboards make: adding additional keys for the thumbs (replacing the unnecessarily large spacebar of traditional keyboards).
This allows the hands to do more with the keyboard while resting the hands on home row. -- For users comfortable adding a bit of complexity for the benefit of increased expressiveness (e.g. vim users), having extra thumb keys allows bringing the full functionality of the keyboard to within reach of the hands on home row.
For me, I think that these keyboards fix many silly design flaws of the traditional keyboard makes them interesting enough to be worth using.
This allows the hands to do more with the keyboard while resting the hands on home row. -- For users comfortable adding a bit of complexity for the benefit of increased expressiveness (e.g. vim users), having extra thumb keys allows bringing the full functionality of the keyboard to within reach of the hands on home row.
For me, I think that these keyboards fix many silly design flaws of the traditional keyboard makes them interesting enough to be worth using.