It's really up to you what you want to do with that. SA (row 3) and DSA keycap sets from Signature Plastics as well as XDA keycaps all have perfectly uniform heights, with no slope differences. If you want Colemak legends, that is a bit of a taller order and fewer sets have that, though some have "compatibility kits" for the homing keys. That is really the only obstacle to just moving keycaps around to get the printed layout.

I use blank keycaps, having been a touch-typist for years. This means that any keycap set with a blank option can be used without it looking weird. :) You could also go the less fun route and just leave it as QWERTY but type in Colemak. I suspect a lot of people take this path.

Yeah, on my laptop the keys just stay as they were. On my Unicomp where modding is possible, I've moved them around for coolness.

Besides, somehow it doesn't feel right to use a keyboard that doesn't at least type what it says it does for the most basic keys. Properly labelled keycaps offer what they say "on the box", and blank keycaps don't even bother with telling you what they do. :P I dunno, maybe I'm only one of a few that feel that way.

And I've had some interesting chances to tell people what Colemak is and why I use it when the keys are labelled. Maybe they'll never change their mind about what they're already using, but they'll be more educated on the subject and see why Colemak is a viable option.

I don't look at it either when typing, and haven't for years, but it's the moments before and after typing that I notice. But you do have a point for those that still have to use QWERTY for one reason or another. I'm lucky in that my wife has her own setup so we don't share a keyboard, and I don't ever share a keyboard at work either. But not everyone has that luxury, and when reality gets in the way, compromises have to be made. No sense in denying that.

For all the annoying qualities of bots, we're sure taking their posts as opportunities for pleasant conversation. :3