Everybody talks about the 30% cut... however, I'm almost afraid to say "be careful what you wish for." A device that allows sideloading to avoid a 30% cut, is also a device that allows piracy. (I'm still in favor of sideloading, but I'm very pessimistic about developers recovering that 30% as increased profit.)
It's just that it will move from being taken automatically by the company to a model where third party App Stores/developers will need to pay it back to Apple on an ongoing basis.
Apple already has a system in place that captures which applications are being launched.
