So let's pretend for a moment the performance between the two models is more or less the same (just assume give or take 3-5%). That's not a big improvement, agreed -- but I rarely upgrade my CPUs these days purely
based on getting a performance boost.
So what does Haswell offer that Ivy Bridge doesn't? Lower TDP? Lower average power usage (not the same as TDP)? More on-die features? I haven't researched the model.
My point is this: if Haswell is "marginally faster" (~3%), yet its power draw is, say, 25% less, then that's a still an improvement, just not in the performance category. This sort of thing would matter especially to folks who run in low airflow environments or hae mass numbers of these processors (25% power savings is pretty dramatic when you have, say, a hundred boxes).--
Making life hard for others since 1977.
I speak for myself and not my employer/affiliates of my employer.