Sorry guys but all this talk about " Its just 30-40% faster OMG WHY 250quid for CPU" is rubbish - Why do you bother buying E8400 / Q6600 and 4870x2 when CLEARLY the performance is NOT 100% higher over E2180 and 4850 , yet the price is not just 150-200% like it will be with nehalem but it's 250-300%?
Your missing the point. The price would be fantastic if it was a socket 775 processor which it isn't.
My point is the upgrade cost is going to be £600-£900 for a 30-40% gain. For that money you can have three GTX280's (subject to having the right mobo in the first place) and see way more than a 30-40% gain in games (I know people do other things with their computers but it is one of the main reasons why people want extra performance)
Yes, people will make the upgrade and pay the money - the ones that can afford it.
Yes, it will all be a lot more affordable for everybody else in a year's time.
And your analogy breaks down on the gfx front. Say you sell your q6600,mobo and ram for £200-£250. The upgrade cost to a Nehalem setup for a 45% gain will be 140%-350%.
I have just upgrade my 8800GTS to a 4870 for the price of 40% with a 20-30% gain in performance.
And I would seriously suggest a 4870x2 plus 8400 will be way over 100% performance gain on a E2180 and 4850. People will only be buting a 4870x2 for 1920 x 1200 resolutions and above with lots of aa/af. At those resolutions, looking at crossfire 4870 performance, the gain is 300-400% which compares favourably with the upgrade cost.
And yes, technology has to move on eventually and that means new sockets on mobos.
But apart from longevity, I still stick with the fact that since Intel arestill going to be making faster and faster socket 775 cpus for the whole of 2009,the £600-£900 could be spent on the fastest q9xxx cpu, an extra 4gb of ram to take you to 8gm, a full watercooling setup for gpu and cpu and mobo, a x48 board and a 4870x2 and you still might have some money left over and potentially have a faster system than a basic Nehalem rig.