On Earth we have optimized for: single core speed, multi-core speed, performance/energy, low demand (for mobile), and performance/energy, high demand (data centers).

A new dimension to optimize for, that space is going to incentivize, is highest stable operating temperature.

Higher temperature operation sheds heat energy via radiation much faster.

Some post-silicon substrate research is aimed at wafers that can operate at extremely high temperatures.

I imagine given how often materials research pulls a rabbit out of a hat, there is a lot of head room for temperature.