Anyone who uses a car lock remote knows that it’s as useful for finding your car in an asphalt sea as it is for, y’know… locking it.
Now close your eyes and imagine a world where bike commuting was so common that it created the same sort of where-did-I-park-the-damn-thing challenge.
On second thought, Don’t close your eyes. Look at this:

That would be a good problem to have.
But don’t worry. If we ever get that point here in the US, we can rest knowing that Dutch entrepreneurs are way ahead of the problem.
Enter the Bspot.
My fellow Americans, order one for your great-grandchildren.
It sells for 14.99 Euros (about $21 US). Shipping and lessons on how to read Dutch (and navigate the Bspot Web site) are not included.
What a terrible idea, another chirping noise to annoy your fellow citizens with. How about something quiet and 21st-century-ish, like a GPS tracker? Should be easy enough, since in most cases the bike hasn’t moved since you parked it and noted the coordinates.
Excessive chirping by cyclists using their Bspots to find their bikes. Another good problem. Do you think we (in the US) will ever get there?