In The Original Series in the 60s, people had no idea what the future would look like or what technology would look like. In one of the early episodes, they had a paper print out machine on the bridge that looked like a fax machine, which was considered futuristic in the 1960s.
Like the example of the Enterprise fax machine, what technology or system do you think are we displaying in the current Star Trek shows that will show how dated we will become in the future?
Alternate interpretation: Starfleet's mobile device UI isn't great for managing multiple documents that you quickly switch between. Everyone defaults to using multiple PADDs because they're not going to see a major revision of LCARS anytime soon.
(Also, they're free and easily obtained, just go to a replicator.)
