It will play okay, like most laptops that have Vista installed, but not as good as it could. They are using the mobile version of the NVidia parts, which are geared more towards saving power. Sometimes newer is not neccessarily better.
Older laptops with parts that could not shut down parts of themselves to save power avtually play games better than newer generation laptops do.
Desktops are still the best gaming platforms. If for no other reason than you can actually update drivers easier and change hardware easier.