Well, let's consider this.. to make a turn signal flash the old way, you need a central relay or thermal blinker, and +12 and Gnd wire (unless the bike is Gnd) to the light.
To do it via network, you need +12 and Gnd, a data wire, a central brain (with a robust PSU to convert the pulsed 12v to steady +5), and a receiver (with another PSU), plus a relay in the light fixture, or near it, so you can control it with low voltage.
So, it would certainly not be easier or cleaner. Cooler, maybe, but don't fool yourself if you just want a project. However -- please consider the safety aspect of having signaling systems controlled by a computer. Make darn sure that thing is reliable before you go out on the road. I know, it's just lights, not brakes or transmission or anything, but as a fellow biker and hacker, just be careful out there, k?