Just watched NIO day on youtube, and I will give some thoughts.
I'm glad to see improvement on station design, however, my background is commercial real estate, so from that perspective, I still see a huge disadvantage over a simple supercharger.
Take a look at this image which is what the station looks like from the presentation. It takes 4 parking spots in X/Y axis (9x20x4, 720sqft), with Z axis at roughly 12-14fts given the references in the picture. All the charging converter and equipment apply to both cases, so I'd just cancel each others out.
This possess a problem for where it can be installed. Not sure about other places, but here in Vancouver, BC, we have superchargers both on the ground like NIO's picture, or underground in the mall's parkade. And I don't have a clear image right off my head with the downtown SC, but I don't remember it to have much more clearance than my X as the falcon door didn't open fully IIRC.
Thus, installing in places other than above ground or parkades with enough clearance is out of question.
Then, in the presentation, it suggested 312 swaps per day max, or 13 per hour, or just under 5min each swap assuming 0 complications. Even just at the 4th car in line, which is the space the station occupies, it means 20min wait time.
Assuming one goes into supercharger low enough and given a 20min charge, I'd say on a V3 supercharger, an average of 800km or 480m/h charge is not overly optimistic if not a bit conservative, that should be enough to bring from near empty to about 70-80% SOC for most of the Tesla. Therefore, I fail to see the advantage on time saving. Yes, a battery from swapping station might come with 90%-100% SOC, but as an EV driver, we know that we just need enough to get back home or to the next charging point. Even on a long road trip, the time saving is marginal.
And if we look at the lineup some Tesla SC had during normal usage, which for me, is the Surrey, BC SC, I usually see about 2-4 empty spaces during regular hours. Meaning that at 8 cars average in regular hours, that translates into 20min+ wait time for swapping.
Also, if I were a business owner looking to host SC... I'd much rather host a Tesla one. Because the swapping station takes 4 spots out permanently. And assuming just 4 cars waiting in line, where do they go? In Tesla case, 4 slots mean 4 cars charging. In NIO's case, not only you need 4 spots to host the swapping station, but also another 3 spots for the cars waiting.
In short, the swapping station looks elegant when there's only 1 car to do the job, but an absolute nightmare when there are 12cars+ waiting.