In some sense the Genesis and its ilk were already disrupted by the Red One, although I question how price-sensitive this market is. Does Peter Jackson care about the difference between $4K per day and $400 per day?
In fact, Peter Jackson IS one of the main supporters of RED, making the first videos and shorts with it.
Peter Jackson will also care about having to move to strange places to rent a camera and return it, and not being able to broke it in the field if he wants.
Peter Jackson probably doesn't care about the difference in price, but there are a number of student and indie directors/producers who certainly feel the difference between $4k/day and $400/day.
http://tvnz.co.nz/business-news/20m-rebate-hobbit-in-first-y...