I view the current state of electronic comic book pricing as market failure, pure and simple. I'm just not going to pay $4 for a comic book that I don't even get to own. I might pay $1 for that, just for convenience.
It's a missed opportunity, too, because I would like to buy comics electronically, because I don't want the clutter of physical comics. Also, I want the creators to get paid. And I think electronic publishing would be a great way to discover new comics that I like.
For instance, when DC did their "52" relaunch, it would have made a lot of sense for them to offer the whole run of 52 issues for $50.