Apple Silicon (M1) was announced at WWDC '20. It's reasonable to believe there would be another major hardware announcement at WWDC '21.
And as a developer who has used 2 monitors for almost 20 years, actual multidisplay support, and not a DisplayLink hack, is a reasonable demand. Even at a developer conference.
But the hardware with M1 in it wasn't announced until the Fall event. So the comment about "new MBP" wouldn't apply. The only reason M1 was announced at WWDC is because it requires work from developers. New MBP doesn't require 6 month lead announcement for developers.
Agree, though I think it'll be shipping well before Christmas (though not in July, as some have speculated... if it were gonna be ready in July, they would have announced it).
I expect the new MBP will have the M2, which should be available in quantity soon. Besides the (presumed) hardware improvements, the M2 will be a marketing-friendly way of differentiating the MBP from the MB and MBA, and persuading people to pay a premium for it.
And as a developer who has used 2 monitors for almost 20 years, actual multidisplay support, and not a DisplayLink hack, is a reasonable demand. Even at a developer conference.