Considering you can get a fairly slim laptop with a 555m, I would say no. Even the AMD card that comes with the 15in MacBook pro is capable of pretty decent gaming, albeit quite expensive. However decent gaming is better than useless. --- http://kigopam.hostoi.com/gallery/UCONNtrickshots.gif http://farm3.static.flickr.com/2611/3918774967_b873628d2e_o_d.jpg
Having Optimus, I switched over to my HD Graphics 4000 graphics. While my CPU is an i7, HD 4000 plays Skyrim at a comfortable level. Probably will get less fps with a weaker CPU on a different laptop, but it's not bad. Just can't play too well with 1080p and settings on high. Still looks ok overall, especially for a casual-moderate gamer.
Playing Minecraft was a bit limiting though. Course I did play it with a few mods on, but I get 30-40 fps on no fog and mods built inside the Tekkit Launcher when using the 4000. Stutters a bit.
Again, my CPU is better than what's inside non-gaming laptops, so results will most likely vary with some games. --- www.notebookcheck.net/Computer-Games-on-Laptop-Graphic-Cards.13849.0.html Best way to determine what each laptop GPU can run on each game. Look for yours in CP