Hmm, so how good are Haswell's IGP supposed to be? It implies...GTX 650 performance? That sounds like it's on-par with the huge 12 inch dual fan'd GTX 560 ti card I have in my machine.
Depending on which Haswell IGP you are talking about. Tom's Hardware benchmarked the low-end one to be only about 20% faster than the current HD 4000.
But even if we were talking about the high-end IGP, it's still not 650 performance, because Intel showed a game running without framerates.
Just for context, I can show Counter-Strike Source running on an Intel GMA 950 and the same game running on a GeForce 680M... and then proclaim that the GMA 950 is as fast as a GeForce 680M.
But it doesn't work that way.
Based on indications, it looks to be almost twice as fast as the current Intel HD 4000, which makes it formidable, but... no desktop chip will have it, only very select (maybe OEM custom-ordered?) chips in the line-up will have it, and judging from the low-end, power consumption would jump as well, so CPU performance would suffer.
Just gotta remember it's still on the same 22nm process as Ivy Bridge...