If anything, that is an underestimate. I really can't understand what they are thinking. Since I am interested in both DVD and streaming, up to now I was completely locked into Netflix because of the integrated system - my "Instant" queue is just the subset of my DVD queue that is streamable.
If they break that link, and I derive no gain from being BOTH a Netflix-DVD and a Netflix-streaming customer, what is there to stop me switching to Amazon or other competing streaming service tomorrow? Absolutely nothing.
This is such a bad decision I actually can't even begin to understand how it made sense to the dude for the whole length of time it took him to write that announcement.
Edit: and another thing. Am I expected to believe that a technology company cannot figure out how to run two different business arms with a single customer-facing UI/website? This is something frigging clothing companies do every day.