It's too soon (2 weeks only since the launch) to say if Lynnfields will sell or not according to the expecations.
We had the same 775 socket for 5 years.
Every time a new processor came, out there were already motherboards to the market to take advatage of the new processor. (new PC or upgrade)
Now we have a new socket.
It is very probable some vendors/retailers to have 775 mobos in stock. (I guess for this sector (Motherboards) , usually stock rotation is 1 month for mobos, probably fastest case scenario 0,5 month, i am talking when buying from asia source directly)
We have to wait one month before to start to count the sales of 1156 in order to have valid view regarding sales.
Also in the past 5 years many people that wanted to buy a new PC or upgrade their CPU had a new 775 CPU choice.
Now if someone (Intel user) wants to upgrade only the CPU, must stick to 775.
And because of the recession, i guess more people now will think to upgrade only their CPU (if it makes sense for their situation) in relation with what was happening in the past.
The Core i5 750 price ($196) is fine (more than fine...) and i think traditionally this is one of the best price levels regarding volume.
Q3 2006 launch 6300 183$ 6400 223$ or before that in 2005 530 at 183$ or 540 at 217$
For me, this situation will last 1 month or 2 months tops, it is just the socket change...
EDIT*
In january Intel will launch the Clarks. I suppose AMD will launch new models then (Phenoms II & Athlons II) and lower the prices of the older models:
Let's see the $200-$100 models:
Core i5 660 3,33GHz/3,6GHz turbo 2C/4T 4MB cache +IGP at $196
Core i5 650 3,2GHz/3,46GHz turbo 2C/4T 4MB cache +IGP at $176
Core i3 540 3,06GHz/no turbo 2C/4T 4MB cache +IGP at $143
Core i3 530 2,93GHz/no turbo 2C/4T 4MB cache +IGP at $123
And after some time will launch also:
45nm Core i5 760 2,8GHz/3,33GHz turbo 4C/4T 8MB cache at $196
I suppose AMD will have then (january 2010):
Phenom II X4 965 3.4GHz 4C/4T 2+6MB cache at $189 street price
Phenom II X4 955 3.2GHz 4C/4T 2+6MB cache at $169 street price
Athlon II X4 640 3.0GHz 4C/4T 2MB cache at $122
Athlon II X4 630 2.8GHz 4C/4T 2MB cache at $99
I like the Core i3 530. (for my needs...)