This has been the subject of quite a few threads in an OA Facebook group. I can't believe I'm saying this, but I side with Liefeld on this. If it comes out of a printer, then it's not true original art. Which means I have no interest in it. I like the traditional pencil+ink style, and that's what I like to spend my $$ on.
BUT, I can certainly see the appeal of mono prints for collectors of newer artists who, as a group, seem to be working more digitally. If you like a certain artist, like Pepe Larraz (whose work I enjoy as well), then a print is the only way you're going to own some of his work. I get that.
I also get that newer collectors must have sticker shock when they first enter the OA collecting world, and these specialty mono prints offer a more affordable entry point into the hobby. I'm really curious to see how the secondary market for items like this develops. I haven't paid close attention to any auctions on Clink or Heritage -- have these started to show up there?
Also, I wonder if the reps for some of these digital artists will encourage them to do some pages in the 'old school' style (or at least covers) so they don't leave as much $$ on the table. Just my two cents...