Performance is relative, if you've been playing wow on integrated graphics for 3 years, then you look at a 4k chip, the 4k performs fine. Look for a laptop with an AMD A10 APU, the A10 graphics are the best you can get without a discrete gpu.
Like the others said, if its things like TF2/Torchlight/TOME/etc then it will do fine otherwise its not anything to write home about.
Where did you see 8.2GB? That seems like a weird number.