Multiseat is a dirty hack. It is about using software to build a terminal out of a random collection of screens and input devices. All it has really done is give us yet another "session" to mentally track, in the form of consolekit/logind, on top of the kernel and X provides ones.
And it is not about thin clients, thin clients btw is yet another Windows-ism, it is about the concepts embedded in the unix concept that current day devs seems to either sidestep or downplay while building house of cards in userspace that poorly replicate said concepts.
You're not really explaining what it is that you think is missing from modern computing. From my perspective, none of this technology has gone away, but some things see very little use for good reasons.
You are not entitled to speak to anyone like that, and neither wisdom nor correctness increase with volume. This is a comment which can only be dismissed. I am sure that you have much better arguments at your disposal, if you would condescend to employ them.
And it is not about thin clients, thin clients btw is yet another Windows-ism, it is about the concepts embedded in the unix concept that current day devs seems to either sidestep or downplay while building house of cards in userspace that poorly replicate said concepts.