Apple's new All-in-Ones are equipped with Intel Kaby Lake CPUs, Iris Pro integrated graphics, and options for high-res displays and dedicated AMD Radeon GPUs. The iMac Pro, a completely new device, will pack a punch with an 18-core Xeon processor and AMD Vega graphics.
https://www.notebookcheck.net/Apple-introduces-new-iMac-AIOs-including-the-powerful-iMac-Pro.226098.0.html