This is a great example. Relatedly Josh Tobin and team (OpenAI) have done some awesome recent work on how domain randomization can be applied to simulated world

This is a great example. Relatedly Josh Tobin and team (OpenAI) have done some awesome recent work on how domain randomization can be applied to simulated worlds to improve the generalizability of algorithms as well: https://arxiv.org/abs/1710.06425 https://arxiv.org/abs/1710.06425