I doubt this is the best time to speculate on Haswell's performance. There might be a healthy bump in IPC just from the newer arch alone and if all goes to plan, Intel might even raise the multiplier ceiling even higher than SB @ 57x and IB @ 63x. Could be lower if Intel wants to troll us from lack of competition. :hmm:
I would prefer an improvement in CPU but it is also good that Intel is taking their GPU seriously this time. Surely we as enthusiasts would cringe in the fact that CPU improvement is not much but for the bigger majority of mainstream users, the IGP could be very useful.
Having more cores is also on my wish list but seeing that the improvement that SB-E and BD had over SB was minimal in the majority of applications tested(minus heavily threaded ones), there are too few heavily threaded applications to take benefit of >4 cores. I'm even skeptical about ARM processors these days with their more cores race and there will be quads for smartphones this year of which I do not know how would they utilize it fully when desktops are still stuck at 4 cores.