The Newsouth dash pod in that link looks a bit obviously 'stuck on' to me.
Thinking laterally... what about a display of the Polar values, but on say an RNS510 or something. You could have 'virtual' needle gauges, certainly for boost, which would make it easier to see psi values at a glance. In theory. And it'd also have that cool factor. Is that possible?
I'm sure plenty of cars come with that, R35 GTR springs to mind.