No offence meant to any Who fans but what significantly "new" has emerged since "Who Are You"...? my most played recording is almost certainly "Who's Next", and I own nothing ("new") post "WAY" (Who wise, excluding JAE stuff)
Depends what you mean by "significant"!
There's the two albums with Kenny Jones, "Face Dances" (1979ish?) and "It's Hard" (1982ish?).
Neither sounds anything like the Who with Keith, so anybody looking for more of the old Who is bound to be disappointed. Both have some good songwriting by Pete, as well as some clunkers. And some cool Entwistle playing. These are the only studio Who albums that capture Entwistle's distorted-Alembic sound.
Then there was a whole lot of nothing during the band's hiatus.
Then there was the "Then and Now" compilation which I still haven't bothered to buy; it featured two new songs, "Real Good Looking Boy" and "Old Red Wine". I still haven't even heard the latter. I never bothered to buy this as I have all the other stuff on it and RGLB is a pleasant enough song but no big deal, kind of boring actually.
Finally, there's "Endless Wire", the first "new Who album" in decades, released in 2006. It includes a mini-opera called "Wire & Glass" with a typically baffling plot by Townshend that seems to be related to both his "psychoderelict" project and the old "lifehouse" story. There are some great songs here, some boring ones, some really weird ones that most old-school Who fans will probably hate. Despite the name on the cover, in terms of sound it's basically a Townshend solo record with lots of Daltrey vocals - it doesn't even use much of the current touring band. But hey, I like it. I had to give the band props for playing a good chunk of this material on their 2006 tour, I thought that was a ballsy move for a dinosaur band.
I'm with you about "Who's Next". I might rate that as my all-time favorite album by anyone. I like all this later stuff, but I sure don't play it that much by comparison.