this must be the impulse behind the yoda and similar[1], but these still don't do it for me: i could not comfortably daily drive anything that solders into a cherry mx footprint, and any mech switches i like would demand a costly, time-consuming from-scratch build.
some mac accessory makers have put out a wrist rest that mounts a magic trackpad in front of an apple keyboard, which sounds like it could be really cool adapted to fit a “proper keyboard”, but user testimonies are that the lack of palm rejection drives them nuts.
for reference, a trackpad to the right of the keyboard defeats the purpose from my point of view, as if i'm going to perform a whole-arm motion to access a different input device, i may as well have my hand land on my trusty wireless mouse: if it's good enough for getting headshots it's good enough for selecting text, plus i get proper mouse chording, which i must admit to missing over in trackpad land.
so, laptop it is. here's hoping my spine doesn't hate me when i'm fifty.