AnandTech wrote an in-depth article about Intel's Ice Lake architecture, you can read and learn from it over here. The article covers the new Sunny Cove cores, the new feature, and the new technologies within. Sunny Cove has hardware protection against Spectre and Meltdown, and promises 18 percent higher IPC versus Skylake.
As with Intel’s previous low-power (sub 28W) mobile designs, the company will be combining the CPU and the chipset onto a single package. This typically helps in enabling a smaller motherboard design for thin and light systems that might want to dedicate that area to additional battery, or simply save the footprint altogether. The flip side is that there are more pin-outs, and the board design has to be suitable for the increased signal traces, but this is nothing new. For Ice Lake-U, Intel has stated that the CPU, which is being built on their second-generation 10nm "10+" process, will be paired with a new generation ‘14nm class’ chipset.