I assume you mean modern tablets. Shall we pick Android or iOS? Because since we are in the business of civilising why the hell not! And if Android, then can we begin with an e-ink display? :)
Something sinclair-like, but in modern packaging with modern energy saving and eink and touch kbd. So it can work from sunlight, run for weeks and endure sand.
I’d even budget one for myself, to speak the same language, so to say.
