Samsungs S9 Ultra tablet has 950 peak so there you go. I didn’t compare TVs and tablets but two smaller form factors by the same company representing miniLED and OLED. Apple is the only company to have both technologies in their lineup to my knowledge. No idea what you’re talking about when you say the iPhone doesn’t turn on everyday.Tell me, is there any OLED with 11~16 inch size and high peak brightness? iPhone's screen is small and therefore, it does NOT represent other devices. Smartphone/TV and 11~32 inch OLED are totally different markets. Cant really compare each other and at least iPhone doesn't really turn on every single day unlike iPad or Mac.
Having 2000 nit on iPhone vs iPad/Mac is totally different. If not, OLED supposed to be widely adapted already but in reality, it never did. And even iPhone gets burn-in easily so I dont see the point when iPad/Mac requires professional grade quality and trustworthy.
Bottom line, even now the tech is there and Apple could very well show off new OLED panels by LG/Samsung. MiniLED was never the answer but a small blip until OLED got better and the prices for MicroLED become a lot less.