if you pay a lot for a laptop you can get a gaming machine, but battery life will suffer, so you buy a centrino with a powerpad and it'll last all day.
my sager/alienware laptop lasts about 1-2 depending, but its a 3.06HT radeon 128MB 9000 pro/m9 ( the 9500/m10 is out now) , it'll play just about any game out there, its got a dvd-r, tv tuner, video capture, removeable mp3 player , 1600x1200 , but at a cost.
then i have my tr1a( well i dont since i just returned it since the tr2a is coming out in a week or so ) its 3lbs with a 7 hour battery life, but about the best games i can play are quake and age of empires.
finally a hp ze5185 which is between the both, its about 7lbs 2.4 ghz with an M6 and lasts about 2-3 hours, it has a large screen.
with two batteries i'd get a max of 14 hours with light use, or i could get a power pad for around 20, again at a cost, i think that'd be plenty for a days needs.
The ony desktop i use now is the sever, which just serves files, so far ive had no need for a non laptop based pc.
most places you'd hang out would have power outlets i bet, i wonder if classrooms have outlet at desks now?
Can't imagine life without one now, wireless networking on battteries, can go anywhere around and outside the house.
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