"Integrated graphics" are just that....its permanent. You can't upgrade it. But as with gaming laptops, the graphics card ("dedicated graphics") is removable and can be upgraded (although there are restrictions dependent upon the motherboard).

If your budget permits it, look for a laptop that has the new Ivy Bridge CPU in it and an Nvidia graphics card. Nvidia has incorporated a technology into their mobile cards that will sense the diff between a routine graphics op (i.e. Word, Excel) and a graphics-intensive op such as a high-end game. It then switches between the graphics card (games, photo apps) and the HD4000 (routine ops) as appropriate. Pretty nifty....saves power.