[NTG-context] How could a typesetting system be today?

Hi, Just because I'm curious: how could a typesetting system like TeX be if it was created today? I've tried google and wikipedia, and all I found different from TeX is a system called 'Lout', but it seems dead. Does anyone knows about novel or interesting ideas that could be used if we would write a new typesetting system from scratch? Thanks for your thoughts, Maurício