Very nice idea, but...
I think the electronics and sensors are already out there for us to in the future include them on motors internally, by the means of a small replacable PCB board, sensor and LCD temperature display, or with additional wiring meens, placing the LCD away from the motor.
Anyone else think this would look sick? (and not forgetting, work well lol)
Welcome to the F1 style and technical side of r/c, the Brushless motor system...
We are already hooking our Laptops up to ESC software, why not to have sensors connected to a PC with USB, or having standalone temperature sensors too?
You could probably get a greater degree of accuracy with a sensor too.
Or, a clip on sensor, with a connector of some description, connect it to your laptop without even having to take the shell off, job done.