I've thought a lot about this, and was figuring how to make it part of PokeGym Labs.
Problem is, any mechanism to communicate pairings is not worth it. Text messages cost money (sent automatically from a central place) and can be unreliable given the cell service inside of a building and the different carriers. Same goes for a Web page...even if the PTO had Internet access to publish it, what about the player's ability to retrieve it? Especially knowing when? It would appear the savings is only the temporary crowding that happens at the printouts. That's easier to solve with more printouts, but PTOs barely want to bother with that. (Sorry for generalizing, I know space is often a constraint, but it's truly the easiest remedy.)
I'd agree that the biggest stages (Regionals, Nationals) would stand to benefit the most, but given how technology works I can envision people standing around with their smartphones waiting to get a page to load, rather than just walking up to a sheet of paper. I don't think significant time savings would be had by the end of the day, and in fact you're introducing more copies of the "truth" by having people perhaps going to the wrong table because they are looking at the wrong information on their smartphone.
Standings, however, could be interesting. Do most PTOs bother with standings in between rounds? Jimmy Ballard doesn't, but perhaps because he usually has really accurate computer entry. Worlds has intra-round standings, so I imagine POP could do it for Nationals if they so desired. So the opportunity is for Regionals and States and Cities, if people care that much.
