This is just the world of televisions today. The price of the today top model depends on research costs, manufacturing costs, dealer advances etc, competitors prices etc. and how much people are willing to pay. It can´t be set to what specs the next model will have.
Whenever you take the plunge and buy a TV you must be prepared that a new model will come, sooner or later (probably sooner). For 99% this is not a problem, they buy the TV and are happpy with that until it breaks down, becomes too small etc.
For the last % it hurts trying to always have the latest version.
B&O has been knowned for a good second hand value. Even if it's falling harder today, it will still be better then other brands.
Fo myself I haven't yet got a flat TV. I was a little tempted to get a BV9 or BV4 before the coming price rises, but I wait 'cause I would like to see the BV7-55 before I choose. But when I have chosen I will stick with that and be happy as I have been with my LX for 18 years now.