The Oklahoma History Museum is also a really cool and large-scale attraction but it's location next to the Capitol makes it easy to miss/forget.

It would be really nice to have a train of some sort tying all these things together.

And given the workforces at the capitol complex and the HSC, a quick and easy way to move between them and the CBD and Midtown (still the place I think most people will end up living) would finally give OKC a real urban experience and help all those areas grow and prosper.