The four 15 W TDP processors will run at slower base clock rates and with the same integrated 620 Graphics as the 7th generation Kaby Lake equivalents. Regardless, the move to four cores and eight threads promises a significant 40 percent performance boost without sacrificing battery life.
https://www.notebookcheck.net/Intel-Core-i5-8250U-i5-8350U-i7-8550U-and-i7-8650U-Kaby-Lake-R-series-launches-today.241768.0.html
So...one can hope to find those laptops at IFA?
If AMD doesn't put any raven ridge models soon, the high tide will be upon them.
see tweakers.net for benchmarks.
Looks good!