Of course, if you're running discs, this won't work.
Why not ?
Well, it
will work but it's more awkward. It's easier to get the sensor to work on the non-disk side because of the dishing, and you're also more prone to bash things on the disk side when fitting the wheel, because you're concentrating on getting the disk aligned with the caliper. (Don't ask how I know this!).
As others have said, just run the wire from the fork bridge to the crown, with little-or-no slack on full extension. Or go from the arch to a brake cable/hose below the bars - this allows flex of the cable/hose to take up some (not much) slack as the forks compress.
I've found wireless computers to be a bit hit-and-miss with suspension forks. Whether this is because of the extra metalwork or the bigger distance between the bars and the sensor, I'm not sure (probably both), but my success rate with wireless is only about 1-in-3...