This future architecture will be made on Intel's 10nm+ process but we still know pretty little about it. The database entry reveals Ice Lake uses the Gen 11 graphics architecture, whereas the current Intel Kaby Lake and Coffee Lake processors use Gen 9.5.
One of the interesting changes is that the new IGP has quite a lot more execution units:
This iGPU is endowed with 48 execution units (EUs), which work out to 384 unified shaders; against 24 EUs and 192 shaders on Intel UHD 620. SANDRA also describes the iGPU as being able to share up to 6 GB of memory from the system memory; and featuring 768 KB of dedicated cache. Its reference clock is 600 MHz, double that of the UHD 620, although its boost clock remains a mystery.Via: TPU