@nightsurge
Well, I don't know about your case but my own 20Mb per sec bandwidth is far from being stable at the max theoretical value, thus I only see an average of about 600KB per second dl. Thus it would take me something like 4 hours per movie, hardly "on a whim".
But let's say that your connection is enough for you, I see that you agree that it will take years for practical bandwidth to be available, and that's still being optimistic: for example here in Italy the most common broadband medium is ADSL through old phone lines, last time I checked less than 3% of broadband users had access to optic fiber, and there are still relevant parts of the territory that are not reached by any broadband tech. We are probably one of the worst cases in Europe, but I guess it will take 8-12 years to have enough infrastructure...
I don't think MS will release a BR reader add-on, but they painted themselves in a corner re the software medium. The DVD is showing its limits _right today_, and at the same time I'm sure we all know that they will want to repeat this gen's strategy: reach the market first and estabilish a foothold against Sony. I'm sure the next gen console is being designed right now, and will come in 2011-2012 with a BR reader, and all the talk about digital as the main mean of distribution will have to be pushed to next-next gen.
PS: in theory no Netflix outside US I think, but I'm sure that with client software on the PC plus some proxy wizardry so that it looks like a national connection it might be possible. Once you're pulling a PC in, there are so many ways (legit and not) to get content and then stream it to your Xbox or PS3 locally... but the whole point was making it practical for the most of the userbase, though.
Edit: added the PS