That would only be true if the total power envelope was same or lower, and that's not necessarily true. Just because your switch has a GbE port and you have a G

That would only be true if the total power envelope was same or lower, and that's not necessarily true. Just because your switch has a GbE port and you have a GbE NIC does not mean there's a full Gbit available for you at the remote end or even in your immediate network. The most common complaint from end-users moving up to 5G is that it's a "drainer" despite no change in personal usage pattern - and the "surprise" is that the Internet doesn't push content to you, you pull content from it. The scenarios where some application "intelligently" adapt to you (e.g. streaming bandwidth for video content) don't entirely equate to power savings on network activity the way they do for downloading a huge file on a fast versus a slow connection. This marketing material from Qualcomm, in the context of cell phones, is purely an inflationary numbers race.