Y por fin tendrá los 4 HDMI completos para 4K HDR y no solamente dos como era hasta ahora, no obstante, serán 2.0b:

The BRAVIA ZF9 hasn't been prepared in time to include a HDMI 2.1 silicon (which as far as we're aware isn't even available at this time of publication), but Sony has at least managed to provide eARC (enhanced ARC) for lossless audio support onto the HDMI 2.0 chipset. In case you're wondering, there are four full-bandwidth HDMI 2.0b ports, double the number found on Sony's previous X1 Extreme TVs. There's no support for VRR (variable refresh rate).

https://www.hdtvtest.co.uk/n/Sony-Launch-New