So far, all the other chips in the lineup, including laptop chips, use a more modestly upgraded version of the current Intel HD Graphics system. Laptops with Iris are coming, but these will likely be larger, gaming-oriented systems and not the sleek ultrabooks that everybody, particularly business users, are looking for. Now businesses don't historically care much about graphics performance, but that has slowly been changing, as applications become more graphically intense and work like photo touchups and video editing trickles down to the rank and file from more specialized staff. Heck, even mining for bitcoinsis best done with a high-end GPU. The bottom line: Haswell is going to be good for graphics no matter what chip you buy, but as with the promises of hours of extra battery life, the results will have to be seen to be believed.
Prices aren't likely to change. The best news of all is that, once Haswell desktops and laptops arrive, computers aren't going to get more expensive. Intel's current prices for 4th gen Core chips are largely in line with what pricing was for the previous generation, before Haswell's arrival. That said, if you're willing to settle for a 3rd generation (or even 2nd generation) Core computer, deals are likely to abound, as the chips remaining on the market are likely to become available at fire sale prices. Don't need bleeding-edge performance or Skyrim in your lap? An older Core i5 should serve you just fine.
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