Intel keeps talking about Gen11 being so much faster than Gen9, but how Intel managed to keep the same ~400 GFLOPs 24 EU GPU from Broadwell-ish as standard for 6 whole years is the real white elephant in the room here, IMO.
They have been heavily limited by bandwidth. The push for higher speed DDR4 and LPDDR4 is what enables these new integrated GPUs.
Cheers