That's the direction Direct File was aiming in. This year it was able to import W-2s and limited other data, but the vision was always to bring in as much info as possible.
The Wikipedia page for it calls it "mobile-first" and the IRS calls it a tool, and I heard it was released as open-source software, so I would presume it's an independent platform from their regular web page, and not just an increased capability of already-existing online accounts that is already available for every taxpayer.
