QUOTE(Disclaimernotice @ May 2 2013, 04:12 PM)
If the Haswell's gt3 is really that good, would it be wise to postpone buying a gt 640m equipped laptop in favour of waiting for the Haswell laptops?
Haswell IGPU has different flavour. The most powerful IGPU in Haswell most probably will only come with the high end Haswell chip, and it is also likely that Haswell ULV chip will carry the less powerful IGPU.
Anyway, Nvidia GT740M will still most probably beat/match any flavour of Haswell IGPU, and laptop with GT740M is pretty cheap anyway. There are even some good deal with GT750M

If you are looking for gaming laptop, don't bother to wait for Haswell, unless you want the better battery performance.
If you are looking for ultrabook without discrete GPU, and not in a hurry to get it, probably should wait.