About caring enough, yeah, that depends, maybe the world is ready for this now :) At least it isn't some overengineered XML grotesquery this time.
Have you looked at some WebGL / Canvas based demos lately? There are now very efficient GPU offloaded rendering APIs that make rendering graphics a breeze, it is no longer a big-overhead thing. If you don't use fancy graphics you're underutilizing your GPU.
[also, TermKit is not just about fancy graphics, but also about user friendlyness/usefullness for some tasks that are not very well handled in terminals otherwise]