I don't think things have really improved on that front. Then again, I don't even look at "desktop replacement" behemoths. Usually at 14" or smaller, since those actually tend to be suited for portable use.
That said, if the OP will be moving a lot, and be limited on how much stuff he can bring, then some giant-ass 17" laptop might actually suit. I dunno. Haven't lived on/around a base in a while. Back when I worked at AAFES in Japan, plenty of the dorm-living guys were buying desktops, home theater stuff, etc...so I assume a desktop would be fine (and thus preferable)...but it was also an Air Force base
