Was on reddit the other day and found an interesting post (no idea if the source is credible) all Sony Tvs that will not be getting Pie update (Z9D is one of them) will receive an update latter this year with what looks like a "make up" for Oreo to look like Pie at least on home screen and how settings are organized and displayed also the possibility of AirPlay functionality. I don't care about the looks but Airplay is something I am really interested in, hope its true.
Living Room: Mitsubishi WD82738 1080p 3D, Onkyo HT-9400 THX 7.1, Oppo DV-980H, Sony BDP-S6500 (Multi Region), Roku 2 XS
Bedroom: Sony XBR-65-850E 4K, PS4 launch edition, Sony UBP-X800
Basement: Sony XBR-75-Z9D 4K 3D, Marantz SR-8012 11.2, B&W 7.1 set, KEF Q50AB, Marantz TT-15S1, CA CXUHD, PS4 Pro, PSVR Bundle, PS3 60GB 1st gen.