I never seemed to have "gotten used to" any games. (However that did work when we went boating, strange as that seems.)
I don't think actual motion sickness and the motion sickness you get from games are the same thing, even though they have the same symptoms. Motion sickness from a car or boat comes from unfamiliar
physical movement. Motion sickness from a game comes from what you perceive through your eyes as movement. That may be why someone can get used to the physical movement on a boat and not the
virtual movement on a computer screen. I've never "gotten used to" a game either.
If you look to the side really fast, do you blink while turning? In a game, you probably don't. In real life I usually do, so maybe others do too. So if a node-based game with panning is making me sick, I can either pan slowly or I can close my eyes or look away from my monitor during the pan.
With panning games, I carefully control the speed of the pan and only look away from the screen when that isn't working. But with real time 3D games, there's too much going on. The relationships between your point of view and objects on screen are changing... and the relationships between objects on the screen with respect to one another are changing as your character changes position and moves past them... and if they do so in an unnatural way, it may trigger motion sickness even if the movement onscreen is not fast. For games like that, I pretty much have to look away from the screen and close my eyes often. I remember reading a post from someone who said Frogwares' games gave him nausea even though the FPS games he played did not. He said it was because the field of view was too narrow and could not be adjusted (the way it could be adjusted in his other games). I've noticed something similar -- I can play games where my point of view is high off the floor (Uru played in 3rd person and the original Tomb Raider), but games where my point of view is close to the ground are going to give me nausea.
Sometimes I focus on something behind the screen and use only my peripheral vision to keep track of what's onscreen. Glancing back and forth between the screen (when it's stationary) and somewhere behind or beside the screen (when there's moving) is not the most immersive way to play a game. But if it helps slow the onset of motion sickness, it's worth it.
Recently I was playing Dracula 3 in my desktop that I always use for games but with an old monitor situated quite high (my normal monitor was out for repair) and felt that horrible feeling after a couple of minutes. I installed the game in my laptop and could play without major problems using the normal tips. Trinny3 also noticed that the laptop was better, I guess that it maybe because normally using a laptop one gazes down that is a more natural way when walking instead of traveling by car or boat.
Do you use your laptop in your lap or on a desk. I imagine those big 17" gaming laptops would be kind of difficult to keep in your lap for long. And the smaller laptops with video cards would get pretty hot during gaming.