First, it isn't clear where the author of the article gets the "trillions of years" lifespan of the universe. Most of hypotheses I've read so far put the heat death at less than a few tens of billions of years, some as early as five billion years. The cited article does not make this claim, although it does make the 92% habitable planets yet to be born claim. So I guess the implication is there would be extremely rapid star and planetary formation in the next few billion years. A kind of last big hurrah before it all goes cold.
The practical application of such a study eludes me though. Given that it takes billions of years for a planet to form and become habitable (to humans), as a species we would likely die out long before ever being able to visit such worlds, or meet an indigenous life form that would evolve on such.
It seems kind of like projecting how many humans have yet to be born until the Earth is no longer habitable (assuming no other factors at play) and stating something like, all of the humans that have ever been born amount to less than .001% of all the humans that will ever be born. It's interesting, but what do we do with that information?
I'm thinking the most interesting part isn't the 92% figure, but rather the rate of formation from which it is derived. Plotting the projection of how many habitable worlds there should be at any given moment, and matching that to our current rate of interstellar exploration for a given number of light years has some practical applications. But given our rate of information gathering and understanding, I'm guessing we make interstellar travel feasible in the next 500-1000 years; which isn't even a tick of the clock in planetary formation time scales.