This is true, especially if you are storing files locally. However, even compared to “CD quality” FLAC, a 24/192 album is still going to be around three times larger (around 1GB per album) to download. If everyone switched over to streaming hi-res audio tomorrow, there would be a noticeable jump in worldwide Internet traffic.
I’m personally not ok with the idea of bandwidth usage jumping up over 3x (and even more compared to lossy streaming) for no discernable benefit.