Good screen grab. Liking what I'm seeing so far. http://www.greencarreports.com/news/1099473_are-these-tesla-model-3-prototypes-under-those-sheets-video
The car in the far right of the pic looks like a Model S, no? It's much wider than the half-sedan/half-CUV Model 3 and it definitely resembles the S... I will say I HOPE that right-most car is a 3, because it looks low, wide, and sexy under that cover.
And in the video (60 minutes Australia) they were scrapping some clay from it so I assume they don't care anymore.
I suspect that the covered car on the far right is the Model 3 sedan. The "weirdmobile" half-n-half is simply the two variants (CUV and sedan) derived from the same Model 3 platform, siamesed for whatever reason. The exposed car on the far left is just an early Model X clay.
Not TOO wide I hope. I would trade some interior room, appearance, and cornering stance, for the ability to fit in compact parking spaces comfortably. I appreciate that many mid-sized cars (like Prius, LEAF, etc.) are < 70" wide.
1) OP: That is not Model ≡. 2) Model ≡ is bound to be wider than contemporaries from BMW, AUDI, and Mercedes-Benz.
Increased width has advantages (safety, stability, storage) and Tesla can afford it due to added rigidity from battery. However, increased width adds weight. If battery pack will occupy floor space as it in MS width and wheel base will be a function of battery pack size at maximum capacity. With that said, if motor's are to be interchangeable between platforms (which makes sense), motor size/mounting may dictate minimum width.