Streaming live TV is still a fairly new thing, so those numbers will take a little time to grow, but streaming after the fact is definitely used more often to watch recent TV episodes, similar to On Demand viewings.
As such, a startling increase will likely be seen once the first weeks of results start to come in.
(Particularly when it comes to Better Call Saul and a couple of others, which can often more than double their initial audiences over a week’s time.)
Of course, Nielsen has for years measured not just people watching the live-night airings but also those who prefer delayed viewing for one reason or another, with the Live+3 and Live+7 measurements sometimes offering more interesting numbers than those that come on the night of a big premiere.