I wouldn't say best in the world, but it has the potential to be a LOT better than even Forbidden Journey, which is what I would call the best attraction at Universal Hollywood, but more on what it would be offering to the table.
As for Fallon, I have heard more than one occasion of Fallon being a possibility, but I guess it has now been killed of any possibility.
So for now, the Studio Tour will have a Tramtastic day..
What I am hoping comes out of this, is that it gives Universal the ability of space to have a indoor coaster, thrilling enough while also still being compact to work out for the park in the best way to balance out the family attractions coming down there in the LL..