The odd part is that this doesn't select for billion-dollar businesses, it selects for billion-dollar businesses that can be developed with revenue growth that doesn't pass through $100m for more than x-years. Essentially billion dollar rev with discontinuous growth through lower revenue - this seems unnecessarily constrained for any business that plans to be around for the long haul.
Another way to look at it is, how good is your estimator of a billion dollar market, vs how good the estimator of the same is with a prior that the good/service can make at least $100M?