I too, was suprised at the success of the Petzval kickstarter project. Of course, this lens can be use on both film and digital cameras. I just can't see it being a really big seller, as most people, in my humble opinion, don't care about such things. It would seem to be attractive to only those with an 'artistic' bent.
In any case, you're right that more new photo equipment, especially that geared towards film, can be a good thing. Some of the Lomography stuff is, in my opinion, kind of silly. Still, if people have fun with it, and increase the market for film, I'm happy.
Guess we'll just wait and see how it all pans out.