I fail to see the allure of , what was it? - "hair-thin depth of focus".. a 50/1.7 already has almost-too-thin a DoF, when used wide-open at portrait distance.
"impeccable speed" is a nonsense.
And "isolates subjects with extreme precision" is usually a function of the user, not the lens...
Has this been designed to appeal to the rich boys completely devoid of photographic knowledge?
Because while I can see some potential uses for a light-gathering monster like this one, "hair-thin depth of focus" is not necessarily a desirable feature, rather a by-product of the large aperture (i.e. I'd try to shoot from a reasonably large distance).