Portability of lots of information should not be underestimated.
It seems certain that much of the success of Unix follows from the readability, modifiability, and portability of its software.
Writing a portable OS is not much harder than a nonportable one, and all systems should be written with portability in mind these days.
Portability should be the default.
We should work toward a universal linked information system, in which generality and portability are more important than fancy graphics techniques and complex extra facilities.
Digital ink technology holds substantial promise in terms of legibility, portability, and power consumption, but I am less confident about the communication aspect.