As the clock ticks on the arrival of the iPhone 6S - or iPhone 7 as the case may be - the futurologists of the mobile industry are slowly working themselves into a lather.
Everyone expects Apple to unveil its latest model, or models, in September. That much is set in stone.
But beyond this basic assumption, it's difficult to predict with any real confidence what will emerge from Apple HQ in autumn 2015.
The latest plucky soul to nail his colours to the mast is the Metro's Ollie McAteer, who has worked up some 'what-if?' renders that give us a glimpse of how iPhones of the near future could look. Should rumours doing the rounds prove to be on-the-money, that is.
McAteer's mock-up pictures a device with a full-side display with no dead space on the front. And in keeping with chatter doing the rounds, there's no push-down home button.
Earlier this week, a source told AppleInsider that the home button - a feature on all iPhones to date - could be gone within two years and be replaced by a virtual home button supported by Force Touch technology.
Other features purported to be on board include a 12-megapixel camera, a welcome advance on the eight-megapixel version built into the iPhone 6, a substantially improved front-facing camera and a beefy A9 processor.