They will come, when the computers are available. But Apple wouldn't invest in doing it at great expensive if it didn't produce a better more competitive product.

Look at the transition dev kit. Also, look at the intel’s iris vs apple’s gpu

Shouldn't you compare to Intel Xe for integrated graphics performance?

No, when you're trying to disrespect Intel it's customary to compare announced imaginary parts to obsolete Intel parts.

Look at what from the transition kit? The only thing available show it having single-core performance that would have been state-of-the-art ten years ago. Is there something newer and more impressive?