Is the Samsung S90H worth it over the S95?

The S90H keeps the OLED contrast and gaming ports but gives up some peak brightness and the One Connect box. If you watch in a bright room or want the brightest picture, the S95 is the stronger pick; in a dim room the S90H covers the essentials.

Does it support Dolby Vision?

No. Samsung backs HDR10+ instead, so Dolby Vision discs and streams play as standard HDR10. The picture still looks good, but you do not get Dolby Vision's dynamic metadata.

Is it good for PS5 and Xbox Series X?

Yes. It has four HDMI 2.1 ports with 4K at 120Hz and low input lag, plus a game mode that reduces processing. Enable Game Mode and label the input for the console.

How many HDMI ports does it have?

Four HDMI inputs, all HDMI 2.1, plus USB and an Ethernet port. That is enough for a console, a soundbar and two streaming devices at once.

Should I worry about OLED burn-in?

Burn-in is possible with static logos, tickers or desktop taskbars shown for long stretches. Vary content, use the screen saver and avoid leaving a news channel paused for hours.