Laptops will obviously be fine, as long as the lot you're on is too complex and you tune your settings to your (V-)RAM amount (eg. no background lots on 2-4GB RAM). The biggest problem (and arguably least solvable) is that we need to decompress all sprites in the game to load them into the GPU, and there's no dynamic unloading right now. It should be possible in future to run the game on low memory devices, at the cost of rotating and zoom taking a little longer to perform.
Rendering can be a little faster, if I implement a few more tricks with the sprite caching. The simulator can be a lot faster (JIT), but that's not a problem right now for clients. (may be an issue for server!)