I have hard time seeing how it may be worth my effort. Switching layouts will probably be very painful and result in productivity drop - and then if I do it, it would be only working on the computers I specifically configure for that purpose. I wouldn't be able to use it on anybody else's computer or on any mobile device. If I were professional typist, the speed increase might be worth it, but otherwise I'd stick with the devil I know and everybody else does too.
I switched to colemak years ago, and it's really not that bad. It's a little bit mind bending to learn a new layout, but after about a week or two of practice, your mind sort of "clicks" into it, and it's like you've been typing that way your whole life.
During that transition period you do not have to use Colemak exclusively. You're practicing a new motor skill, and the returns on such practice diminish rapidly after an hour or so per day.
Once you've learned Colemak, you will have to use QWERTY for just a short time each day to make sure you keep those neural pathways from decaying. I did not do this, and I regret it. I do alright on a QWERTY keyboard though; it just slows me down a bit. On a mobile device, it really doesn't make any difference, since the letters are in front of my eyes.
I find that I rarely ever use anybody else's computer on which I cannot use Colemak. And on mobile devices, touchscreen QWERTY is just fine, since it doesn't suffer from the same inefficiencies that the keyboard QWERTY suffers from.
Bottom line: I get to use Colemak all the time that I want, and I never have a problem with mobile devices. Win-win!