The hyperbole of the language belies the underlying truth: not the death of the PC, but a widening of the spectrum in which PCs are a minority among numerous types of computing devices.

This is very much besides the point but I think that calling what you just described the end of the PC era is not hyperbole. When PCs stop to dominate personal computing – like they have ever since personal computing existed – that would be very much the end of an era. No hyperbole involved. That doesn’t mean that PCs will suddenly stop existing or even stop being made.