Scientists report that the observed background hum of gravitational waves has grown in significance over time, providing tantalizing proof that there may be hundreds of thousands or even millions of supermassive black holes about to merge in the next few hundred thousand years, even though the gargantuan objects themselves haven't yet been spotted. <
Beyond confirming that there are background gravitational waves, what are the implications for this confirmation? Also, any other effects that could result from the portion I pulled from the article, beyond more ripple effects?