What do you mean by that?
Some software packages will determine if the gpu of your video card has the ability to offload some of the tasks for video decoding and, sometimes, encoding. If your software can take advantage of that muscle, then you should exploit it (i.e., buy a computer with that power). If not, then there's no reason to spend money on something that won't help you. You will need to check your software vendors' web pages for the specs on those packages. If you can't find it, then email them to see if they do use the gpu for those tasks. Be specific - ask "does it use the gpu for (1) encoding and (2) decoding?"
The HP I'm using has a 1.8 dual core and it specifically says that my vid card is the problem, so I'm guessing the Macbook or even the Macbook Pro would be more than enough on the cpu side of things.
Which Nvida Go gpu does your HP have? Some of the Go chips can decode H.264, such as the one in the Apple TV (which is why it has such an anemic cpu - it's not used for video decoding at all, only managing the OS).
Also, when you say it is the "problem", can you be more specific as to what this problem is? Is it an input problem (i.e., acquiring video from the camera), or editing problem, or something else?