Definitely would be awesome to see this on canvas, I never really thought of doing that before. Usually I just get mine printed out on large sheets of paper. If you are looking for some pointers/critiques though, heres some things that I thought of:
1) The mountain tops seem a little too smooth to be realistic. Mountains are normally much more jagged and rough.
2) The lighting on the cumulus clouds is beautiful... but the clouds themselves are perhaps a bit too soft looking.
3) The snow line is a bit too straight and obvious, try lowering the coverage a little, increasing the min altitude fuzzy zone, and setting some slope constraints as well (about 50 degrees or so)
Again... just some thoughts. It really is a beautiful render