I mean, yes, there will be process improvements. The article talked about 28 atoms as the next step. But there are fundamental limits, and they aren't very far away...
(I could be overstating the case here, in that transistor density may scale as the square of the line width, rather than linearly with it. The point about fundamental limits still stands, however.)
Not part of Moore's Law but there are also
1. Significant storage improvements, and bringing the storage closer to the processing (or the other way around) which massively improves the overall speed.
2. Better chip design. Not knocking the current designers, but it'd be foolish to assume we have the theoretical optimum chip designs.
3. Cost. Sure, you're not going to improve every use case but what if my motherboard was just a big layer of cpus with non-volatile huge caches because it cost pennies? Particularly when we hit some larger limits, we'd be likely to see that current best design being produced by lots of people and getting cheaper and cheaper.
Along with 3. comes more custom designed chips. If we can get the cost of design and fabrication down, we can speed things up by having a bunch of chips for specific functions.
In a single step, by switching to an experimental new process. It seems likely that, if that process pans out, it'll then get years of extensive refinement to improve both yield and density.