There might be a market for an e-paper based version of this that shows an entire day or week of schedule.
There is. In fact there's a whole suite of products out there serving it. At the base level you have DIY solutions (small LCD's, e-ink etc) which are loads of fun to build and can work quite nicely for some scenarios. Another option that a lot of buildings are starting to use is iOS / Android apps along with a device in a wall mount ( https://eventboard.io/ et al). Cheap (ish), easily replaceable and upgradeable hard…
One more thing - is there much movement on automated minute taking (speech to text as it were?). In terrible meetings my mind occasionally wonders ...