Well, I thought its not an unreasonable question, and at least I should have tried.
Take the water analogy of the first poster, it seems to me highly pretentious. You really think that the Beolab 5 is the and of all and that's it?! Water is not a man-created liquid, Sir!
Soon or later, if B&O have desire or need to a new pair of speakers they'll do it. I wouldn't like to spend that amount of money to find out the morning after that B&O lunched a new speaker.
I believe in evolving technology. I do also believe that in the audio world there is lots of non sense and crap. I don't like companies that upgrade their speakers every year claiming new discoveries and that's another reason why I am considering to get the BO5, which I thought they sounded great in my first and brief audition.
For what it matter, I didnt like the sales people at B&O store because they were telling me lies. As an example I asked them when these speakers were first made and they said "2007"... There it goes my trust in them.
Anyway, I thank you for all the replies.