800.156 just says "communication outlet" and these days I would think that was a Cat 5 or better. I agree POTS phones are going to be a shrinking presence in homes but there will be some kind of "communication" going on.
A builder with any regard for his customer would have a drop in virtually every room. I have 6 PCs and a printer on my network all the time.
I also agree this probably does not belong in an electrical "safety" code.
