I can see the benefit, although personally I'm too attuned to ctrl+c,v,z,x
A key I'd really like to see on computer keyboards is a shift key that behaves the same as on a phone, toggling between lowercase, Title Case, and UPPERCASE.
It'd be so useful to be able to select text you've already typed and change the format. Phones have done it for years, why not computers? Could be a much better use for the Caps Lock key.
Even if we just had one more, it'd open up a huge new range of possibilities. Ctrl, Shift, Alt and now Var (or whatever)
As well as the 26 new Var + _ combinations you'd be able to have:
Hundreds of new shortcuts! As long as you could remember them of course :-)