I don't see it happening.
The concepts for a PC in your vehicle are pretty much the same whether it's a sports car or a lowrider or a small pickup (like mine) or a semi or a tractor or a snowmobile or a boat.
I don't know what you consider "frills".
Is satellite navigation a frill? How about stereo integration? Perhaps CD playback? Rear-view camera?
Perhaps lighting and the additional stereo components, I suppose.
Using a controller to activate actuators and such would constitute "frills" in my mind.
You think space is at a premium in a full-size truck? Try installing in a sport compact.