Sun sold something calls a sunray which was basically a dumb display. Just enough compute to handle the usb devices and send the events over the network and decompress and display the resulting video stream.

Unfortunately sun tied the sunray to incredibly expensive/slow sparc servers. So while the terminals would never need upgrading, the servers where never competitive in the first place.

It's also silly to have expensive server ram filled with frame buffers and the zillion client processes that normal desktops have for weather, date, time, calendar, notifications, speaker volume, notification mirroring, etc.

A more enlightened approach would be something more like plan 9 where compute can transparently happen client side or server side.