Will streaming kill the DVD?

So Netflix just announced an all streaming plan for their service. (Congratulations Netflix you have finally earned your moniker.)   But will the mail service go the way of the buggy whip?  In my estimation this will not happen until you can get ubiquitous wireless net service at high enough speeds to allow streaming anywhere.  Right now this is not a reality.  Consider the family trip.  It would be great to stream those vids for the kids in the backseat.  But how?  What about that cabin in the mountains that does not have wired service?  Satellite may be available but line of sight may be blocked.  How about watching a movie on a boat a couple miles off shore?  Until a user can get high speed wireless access in all these locations you really won't see an end to the Mail order movie business model.