A typewriter is more portable than a typical PC and printer (laptops excluded).
The current drain of a typical PC is not high, but connections loose enough to allow make and break in the power supply could be disastrous.
Historically, gaming computers had several distinct hardware components that set them apart from a typical PC.
The typical PC can display only a half page at a time in one boring typeface.
The high resolution eliminates the need to constantly zoom in to study detail, as is necessary with a typical single-screen PC.
A typical PC consumes something like 300 watts.
These units, like the ones inside a typical PC, have the drive mechanism and the media all in one sealed case.
The 12.1" screen size is larger than typical for this class of ultra portable PC.
The typical PC uses all three of these major kinds at once.
The back of a typical PC is an uninviting collection of bare connectors.