In my view, cycling doesn't need an ultimate goal. I do think that the conditions for bike commuting are a decent measure of how bike-friendly a city is in general, but there could be other measures as well. In my locale, the bike paths and lanes used by commuters are also used by recreational riders during the weekend, families with kids, etc.
I'm happy to encourage small, incremental steps. Don't have a bike? Get one. Your bike has fallen into disrepair? Get it working. Got a short trip to the post office or library? Take the bike.
Don't forget that there are also things car drivers can do, to reduce their car-bon footprint. Combine trips. Drive a smaller car. Shop less. Try the bus. Just being more conscious of the efficient use of transportation will gradually get more people onto bikes.