Note that Coffee Lake-S is listed as 95W/210W. 210W is the max PL2 value. Remember all the power consumption controversies surrounding the 9900k at launch, and the reviewers who were getting different numbers depending on what were the default settings from board OEMs? AT had to rebench their 9900k with a different board because their initial test was on a Z370 that was adhering to PL2 values of 210W. Today, most boards will make a 9900K into a 160-170W TDP CPU unless the user specifies something else in the UEFI. The lowest "normal" TDP is 95W.
So now we have the 10900K which is at a minimum going to pull 125W, with a PL2 of 250W. So if you want that sweet, sweet ~5 GHz 10900K all-core overclock, you're gonna get power figures at or near PL2: 250W. Holy crap. Push above 5 GHz to try to hit the max turbo on all cores and I could see 300W easily.