You still only need 1 powerful computer. Networks are so fast these days and we have stuff like Tailscale it’s pretty easy to use the laptop as a dumb terminal and do all your work still on the fast computer.
Then there are non-development tasks, like 3D modelling or video editing.
Remote desktop is a kind of solution, but it's extremely sub par. Latency is not good unless you're on the same LAN in my experience.