well given that 3dsha.re is doing good business - I'd have to say yes.
People who can't be arsed to design their own stuff will pay for models.

Also given the number of threads we get round here where someone has bought a printer and then wants to know how to switch it on, load filament or find something to print. There are an increasing number of people buying 3d printers who don't have design skills and don't want to develop them.

So yep - the more printers in the wild - them more people who actually can design things will be able to make money selling the designs.
It's my plan anyway :-)

Should I ever want an artistic - as opposed to practical - model for one reaso or another, I'll most likely have to pay for it.
I don't do artistic :-)