[Kong]

Short answer ask again in 2012.

N64 was produced until 2002. We do not add systems until it has been out of production for at least 10 years. This is our definition of retro and I feel a decent compromise between preserving the past and blatant infringement.

Aside from the 10 year limit there are technical limitations. The video card requirements and file sizes are larger than anything we currently have. And configuring N64 to run on a computer currently requires tweaking settings for each individual computer that isn't really easy for our system to automate or for a novice computer user to manually setup.