I understand this is more about form than function. Because if you want a framerate counter as a user, you'd probably rather have a software solution.
When playing a game, you are looking at the screen, not the console. Since you would only be looking at this information when you're not actively playing a game, there is no need for a little physical display to always show this information, at a distance that you might not be able to read it. This screen/hardware would also add cost.
Software could just log min, max, avg, frametimes, torn frames, curves, offer various sorting methods, diagrams and whatnot. You access it when you want to look at it. Could also offer an overlay, because why not.
As for form, I feel like you would eventually grow out of love with this stupid sexy display.
When I look at images of the XDK, sure it looks real slick for a development kit, but what truly catches my eye is them USB ports on the front. If the Scorpio doesn't have those...
There being no USB on the front, one on the side and who knows how many on the back, is completely baffling. USB ports are infamous for their 50/50 wrong-way insertion rejection. Users don't need to also worry about sideways-finagling trying to feel where the port even is.