You would need to dig back through all the pages to find the insider posts. But, I'm sure it was said that buses from those hotels to the same resorts as the gondolas will be eliminated. That's the entire point of the project, to provide a more efficient higher capacity transit from those resorts and at the same time eliminate traffic from the roads.
The gondola's will easily hold 1 ECV or 1 wheelchair. Maybe even 2 wheelchairs depending on size. Same for strollers, easily 2 small strollers, maybe just 1 of the huge double jogger models. No folding, roll right on.
Just look at some of the videos above or the Doppelmayr website at the 10 or 15 passenger cars. I think it was said they would be 10 passenger cars, but don't quote me on that (it's in the prior pages somewhere). A 10 passenger car is 2 benches, front and back for 5 people each, with space in the middle between them. Plenty easy to fit strollers, ECV, wheelchairs in that space. If they can flip up a bench on one side, that creates even more space, at the reduction in seating. Of course, that person has a seat already and doesn't need the bench.
If you want to talk about space utilization per car, then you also have to talk about how they'll likely load them for normal operation and at busy times. At a non busy time, I can see them just putting one guest group in each car. Just 4 people in your group, you get a car, plus empty space. With 8 people, you get a car and less empty space. At a busy time, 2 groups of 4 have to share car, or 2 groups of 5, or a 4 and 6 group. That group of 8 might still get it's own car, unless there is a group of 2 relatively near the front of the line. Or, they never merge groups even in busy times. It's packing problem, and there will be empty space that's underutilized. If groups of 8, 4, and 8 show up in that order, they're not going to make the group of 4 split up to fill 2 with each of the 8 cars, that's just poor customer service to force a group to break up across cars that are larger than the group size.