I'm exploring a new Section API. In Unite 2019 was mentioned that apps could provide custom sections for merchants.
But I can't find anything in documentation right now that would explain such customization.
Summary: how an app could provide for store owner a custom section which content is generated by the app?
Solved! Go to the solution
This is an awesome functionality indeed. But it is still under development and I doubt Shopify is going to make it GA before holiday season.
Which means the public version will be available next year? Looked at the 2019-10 and 2020-1 RC version updates, but didn't find anything regarding Section Everywhere version.
So can we expect the new Theme Editor to work in Developer Preview store by the end of this year?
A developer preview of the app section functionality is coming by year's end.
The public version will be available next year. This is a monumental release. Unfortunately we've hit some delays and have had to make changes in response to partner feedback (an updated developer preview is coming out soon).
A partner beta of the new editor UI and app sections is planned for Dec/Jan.