Let's not forget that a role was played by websites like this one, with speculation and rumors driving investors over the cliff of sapphire iPhone predictions.
There's a reason why Omega Seamaster (diving) watches use sapphire crystals, and the Omega Speedmasters (moon watch) use Hesalite (acrylic). Sapphire has good compression strength, but has limitations in terms of breakage resistance in tension, even in the relatively thick sections used in watch crystals.
We will likely never see an affordable pure sapphire phone face in the size of a 6 series. Some sort of sapphire-glass lamination is possible, but you won't see affordable monolithic sapphire screens in these sizes in this decade.
There's a reason why Omega Seamaster (diving) watches use sapphire crystals, and the Omega Speedmasters (moon watch) use Hesalite (acrylic). Sapphire has good compression strength, but has limitations in terms of breakage resistance in tension, even in the relatively thick sections used in watch crystals.
We will likely never see an affordable pure sapphire phone face in the size of a 6 series. Some sort of sapphire-glass lamination is possible, but you won't see affordable monolithic sapphire screens in these sizes in this decade.