***Updated with some info in regards to possible pricing & launch date listed below***
Found this little article about the incoming IB processor lineup.
From what the article states, it doesn't sound like a dramatically large performance jump.
Quote:
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Ivy Bridge won't be a huge leap forward in terms of CPU performance and it looks like we'll have to wait for Haswell in 2013 to see if Intel can make another significant jump in CPU performance. In all fairness it looks like Ivy Bridge will be more than good enough for consumers though with vastly improved graphics – at least in some models – and a few additional features.
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I know some people will still upgrade regardless.
However I'm sure more than a few, will likely wait for the LGA1150 (Haswell) to be released after IVY Bridge, before their next upgrade.
Source
ps: I'm interested to see how that i7-3820 performs.
Sorry for delay in updating.

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Update - Pricing
Source
For the most part it seems pricing will be similar to existing products.
One has to wonder if this means that Intel may actually drop the SB chips down a few dollars putting even more pressure on AMD?
Many people have commented there may not be large gains in performance and overclock numbers, as Intel's main focus was to die shrink & reduce power consumption.
Launch date speculated to be around April 8th, 2012.