It's a cute toy and a fun educational tool, but "computing for the future" seems like a bit of an overstatement.
Veritasium explains it really well in general here (and demos the device) https://www.youtube.com/watch?v=GVsUOuSjvcg
In what concrete problems do you (or Veritasium) think analog computing could beat a GPU?
Solving (systems of) ODEs without the issues that can arise from numerical solving like numerical instability. Oh and it does that instantaneously.
It’s unlikely to replace digital computers, but it might find a new specialized home in components.