Presently the only two things Apple sells with a choice of white or black bezels are iPod Touch and iPad, and that depends on chassis colour. Grey or black gets you black and other colours get you white. All other mobile devices have black bezels.
Since their redesign a few years ago all MacBooks have black bezels. The next redesign, expected later this year, remains to be seen: will they retain black bezels or will they adopt the new iMac’s white bezel scheme? I serious doubt they will offer both.
Presently a vocal minority are losing their minds over the new iMacs white (or light grey) bezels. There is a lot of tea leave reading, rationalizing and just plain wishful thinking to assert Apple will absolutely have black bezels on the new bigger iMac or at least an upper tier model to satisfy the tastes of “professionals.”
They just ditched an iMac Pro. Now it isn’t impossible to reintroduce another one given they dropped the iPad Air awhile back then brought it back redesigned. Will they do that with the iMac? Maybe.
It’s possible the big iMac could have black bezels and the bigger device is aimed at a slightly different market. This appears based on the assumption the 24in. iMac cannot be a “serious” machine because it has colour options and white bezels—no real computer would have that goes the thinking.
A company can opt to diversify one of its lines where it didn’t before. But in this case: why? The iMac has long been marketed as one line where the only distinctions were specs and display size. They could now start to do it differently, but is it likely? As said above they had an expensive iMac Pro and pulled it, so would they reintroduce that given a Pro line tends to be priced significantly over the regular line?
I think it far more likely the new iMac lineup will parallel the previous one where the distinction is in specs and display size. It was a winning strategy so why fix something not broken? As such a new big iMac, whether called a Pro or not, isn’t going to be priced into the stratosphere like the old one.
Will the big iMac have black bezels? Maybe, but I seriously doubt it if the distinctions between models remains only specs and display size. Apple has spent years market researching and designing the new iMac—they probably know better than so many second guessers.
The evidence for white bezels is presently stronger than the rationalizing for black bezels.