Wouldn't a "cinema model" be more like releasing arcade machines first, and console versions later? Your idea (or the one I just described) doesn't put the customer first, and that would be it's downfall. It's never the best strategy to try and alter customer behavior rather than examine customer behavior and meet their interests.
Right now, I'd only be interested in a handheld with DD because I wouldn't feel a significant advantage from DD on a home console (going to the shops/town/mall is not a big deal, I go there for food etc. anyway...). But carrying around DS games is annoying, and I have lost DS carts. Provided the handheld itself is not made worse by DD, I would be happy to have a DS with DD. Especially if the DD works over a mobile phone network, and I can purchase games using my account with that service.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.
