A Linux machine is likely to run the Python graphics generator, or a full emulation of an 8-bit micro, far faster than a real 8-bit computer. This makes it a great way of developing and debugging programs far faster.

To optimise speed on a real 8-bit machine, remember that floating-point maths and trigonometry are hard work for 8-bit micros. There will be a lot of this in 3d graphics. Minimising this will be a test of your programming skills!