Judging by the size of the backs of some CAT6E keystones I saw about a year ago in, of all things, a car dealership's new sales office, it looks like it might be time to introduce a new, larger standard for the RJ45 connector's business end. They looked like they were about 3/4" square!
This wire would not be a good thing to run in a bundle. Two such cables, bundled together, would be more than twice as stiff as one of them. It would be difficult to bend one of them inside a normal depth junction box. It would be really difficult to bend two of them. It would be near impossible to run more than one through a 3/4" conduit!
The first article I find about this ([Link: fiberopticshare.com]
) mentions frequency and shows pre-made cables, but doesn't mention diameter or even the wire gauge. There's no mention of how difficult it will be to terminate keystones for this wire. This is as bad as all those consumer ads that show all sorts of electronic devices with nary a single wire in sight.