Question is, do I need a more powerful CPU and GPU than what Samsung currently has? I wont be playing games on the laptop.
Would high def movie be a problem?
Hmmm, shouldn't be. The Intel x4500 in the Samsung is supposed to be able to handle high-def video. (I don't have one, so I can't try it out personally.) I would expect the CPU to be enough for that too.
With no gaming and the tasks you described, you should be alright. The 1.8" hard drives in all of these systems are a little slow though, so things will load a little more slowly than on a laptop with a 2.5" drive. Getting the SSD will solve that, but it's expensive.