Display analyst Ross Young said back in September that the entire iPhone 17 line-up would be getting ProMotion displays, a feature currently exclusive to the two Pro models. This is now backed by a new supply-chain report over the weekend.The latest report is a little less specific, referring only to a high refresh rate, but it does imply that non-Pro models will get both ProMotion benefits for the first time The refresh rate of a display measures the number of times per second the screen is redrawn, or refreshed, and is expressed as a Hz reading. Non-Pro iPhone models have 60Hz displays, meaning they are refreshed 60 times per second.Many of todays displays offer higher refresh rates, but the more sophisticated approach is variable refresh-rate displays, which can reduce or increase the number of screen updates to suit the content. This is made possible by a type of OLED technology known as LTPO (low-temperature polycrystalline oxide).Apple uses the name ProMotion for its variable refresh-rate displays, which can go as high as 120Hz and as low as 1Hz. This offers three benefits:120Hz doubles the frame-rate of games and similar content, for greater responsivenessIn-between refresh rates conserve battery power when fewer updates are needed1Hz enables the always-on display, as this rate consumes almost no powerReportedly coming to all iPhone 17 modelsRoss Young reported that LTPO displays are coming to all iPhone 17 models next year, which means both the base model and iPhone 17 Air will get the new feature. Weibo leaker Digital Chat Station who previously posted accurate leaks about the telephoto lens coming to the iPhone 16 Pro and the larger sensor size in the main camera this year has now echoed this, from their own supply-chain sources.Judging from the supply chain materials, the standard version of the iPhone 17 series is likely to have a high refresh rate.This would certainly be a timely update, as variable refresh rate is already commonly found on Android smartphones priced below the base model iPhones. Photo: AppleAdd 9to5Mac to your Google News feed. FTC: We use income earning auto affiliate links. More.Youre reading 9to5Mac experts who break news about Apple and its surrounding ecosystem, day after day. Be sure to check out our homepage for all the latest news, and follow 9to5Mac on Twitter, Facebook, and LinkedIn to stay in the loop. Dont know where to start? Check out our exclusive stories, reviews, how-tos, and subscribe to our YouTube channel