Depends on what you need your laptop for. If your a photographer who needs a powerful computer to view photos and potentially edit video on the road, of course bigger and more powerful is much better.
For me, when I travel, all I need is a web browser and an Internet connection. Email and ICQ, and some general web browsing. Of course, when I travel I like to travel light so smaller is better. I have a little Dell netbook flip trouchscreen.
Clearly not what your looking for, but if you like to travel light and don't need much... This is perfect.