Indeed, first of all Apple might not be around any longer, without the reverse acquisition played by Jobs, who knows how well BeOS inspired Mac OS would turn out.
There would be no iPod taking Apple out of red zone.
There wouldn't be FOSS devs flocking into Apple hardware as replacement to sponsor Linux OEMs instead.
And it would be yet another C++ focused desktop operating system, assuming Apple would survive the transition in this alternative reality.
If BeOS had the ability to output graphics to printers at the time, we'd be in a very different world today.