Indeed. Having watched this video, I am seriously considering abandoning Things. I switched to Things 3 from OmniFocus when I reached the point where I felt OmniFocus was too fiddly, and was kind of getting in the way. For my needs, Things 3 just works. But this update to Reminders seems even to improve on some of the features of Things 3, that were missing for me, from the OmniFocus days, such as being able to nest or re-nest sub-to-do items, in a group, or even to another group. The one area where I think Things 3 has an edge is to be able to add top-level narrative in a to-do, over the sub to-do elements. But I am not sure how necessary this feature is for me. Will need to think about it. Either way, this is a very welcome set of new features and is giving me serious pause for thought.Looks great, looks like they've borrowed a lot of ideas from my beloved Things 3 app. Not sure it's a replacement for Things, but it's definitely going to be the default To Do app for many users going forward.
PS: one thing Things 3 doesn't seem to do at all is allow shared lists... the ability to "add people" to a list here is very nice indeed.