Yes, the 28W and 45W chips suitable for the TB 13“ MBP and the 15“ MBP will be Coffee Lake and Kaby Lake refresh, respectively. However, after seeing the benchmarks of the 15W Cannon Lake chips, I‘m optimistic. These chips sacrifice just a little single core performance for a roughly 40% multicore boost.
The bad news is that the 13“ nTB model will probably lose GPU performance, going from the Iris Plus 640 to the UHD620. I still expect the TB model to keep the more powerful iGPU, since there‘s a lot of power headroom compared to the 15W chips. Considering the way the turbo boost works, I expect the other models to keep comparable graphics performance and single core CPU performance, while gaining significantly in multicore performance.
Granted, that‘s not the huge upgrade Intel is promising for years, and the lacking support of LPDDR4 hurts. But for me, this update finally pushes the TB 13“ MBP in a performance class I can work with. If Intel doesn‘t screw up again, that is.