The blog post is very light on details. My intuition is that this is primarily focused on powering the map on osm.org in service of people who edit OSM getting to see faster updates. This would be in keeping with their current raster tiles, which are not meant for use in "real" applications.
There are enough technical challenges in rolling out vector tiles with minutely updates for editors on OSM -- in my opinion, they should solve it for OSM first before thinking about committing to a specific schema for public use by other apps.
Still, anything that incentivizes innovation on vector tiles is pretty exciting. One option that could be interesting: provide "fat" builds of tiles that have every feature, and create tooling to do something akin to treeshaking so people can simplify the resulting tiles to only contain the features they need for their use case.
The nice people at https://download.geofabrik.de provide daily country-level OpenStreetMap extracts in the Shortbread schema, which is the same schema that we are going to use for our live tiles.
But also, it turns out that there's a question of how that data is generated. There's a certain schema of what sorts of things show up in the browser, perhaps with styles giving options for how to display them. But which raw OSM data you decide to include, and which visual element it corresponds to, is up to the producer of that data. So thinking of Organic Maps and OsmAnd, I bet they choose slighly different things and probably change it over time.