One idea I had a while ago was that you could use these for saving energy by targeting exposed skin surfaces only. This would be particularly useful for offices: the office can be set to the lower temperature preferred by men, and then women can be targeted by the infrared heaters to keep them comfortable as well, so no one has to be uncomfortable while still saving energy. (It has to default to colder/male preferences because you save more energy by keeping the office as a whole at the lower temperature, and anyway, there's no such thing as an 'anti-heat beam' so you can't cool down a subset.)

The thing is... heliostats are expensive, susceptible to breakdown, and require maintenance. And panels are getting cheaper and cheaper.

If you’re dealing with “free” rooftop mounting space, it’s cheaper to just throw more panels at the problem.

And you’ll get better peak power with more panels.

Or get a manually adjustable setup and manually adjust them for each season.

The sun follows a pretty regular schedule, so might be easier to just program that in :)

That sounds like a fun project, but economically impractical. When we installed panels on our roof it was cheaper to just lay them flat and buy extra panels to make up the difference, than to install them on static frames to angle them for most efficient energy generation. If static frames are not worth it, dynamic ones are definitely going to be too expensive.

Perhaps at scale, things would be different, but I doubt it.

Here is an example of that https://www.youtube.com/watch?v=_6QIutZfsFs