Would like to offer a different viewpoint here.
I have very little experience with Catia which is about as closed of a system as you can get and leverages the cloud heavily for file storage and interoperability, and sitting with the the Catia guys, going through their model and trying to understand how it works, it makes sense for Catia - there are workbenches like freecad, but they have opted to separate them into different apps, sometimes with different file extensions. Also, some of the lighter apps are completely in the cloud, like their version of Grasshopper/Dynamo called xGen (by the way it's the best node based geometry based apps I've used, as it has also automatically builds a tree, for non technical users, but a different topic), and also their file interpolator that can export files to Revit, rhino, etc is a cloud app. This means that some of the heavy computation is done in the cloud, and that the cloud-based apps could constantly get updated without massive overhead. Their ecosystem is also designed to be modularly shared, for example for structural engineer to be able to tap into some of the files, mechanical in others, and so on.
From the perspective of what it could be, I can see why Autodesk might try to push it. Also, from the perspective of an architect working professionally with Revit by necessity of working in a large company, I can also see some benefits of having an asset manager-like system for projects, something like BIM360 on steroids.
The problem is that it's Autodesk, which means it will be messy, and would likely result in doubling up, with files/asset management in the local company's cloud and one on autodesk. Some revit projects that are a live collaboration between different offices are already completely cloud based and the trouble there is that you need a BIM manager being able to help on the project for any time you are doing something out of the ordinary, like trying out a new option sketch. There is zero flexibility for designers. I am however, not sure how well sharing files works with a wider consultant firm for firms that use BIM360 extensively.
Yet, these trends are hard to stop. Remember the beginning of the switch from perpetual to subscription licensing models? Sketchup, also has a ton of new cloud-based functionality. Also, I do agree, that it's hard for it to be the death of the individual file. I remember iPads before Apples released the files app. It was a black box, but the files did exist, just the user did not have access to them. They got smart and finally introduced a files app, realising that individual files and file organisation is certainly not dead.