Well Vegas is getting a high speed train too, but (un)fortunately you won't be able to see the sphere from it. It also has a 'cathedral'. Before the sphere opened they were planning on building one in London too (and maybe Singapore? I forget) so there will probably be more.
But they still refuse to build a subway on or pedestrianize Las Vegas Boulevard, supposedly they're building a whole giant Boring^TM^ tunnel network but somehow I doubt it'll happen.