I guess a 1 million-watt UHF signal will have more punch for getting through walls and windows to reach set-top antennas within WBTW's market area. However for me, I bet it will mean I will rarely see WBTW any more. Roughly half of all nights I am able to see the 11pm news on WBTW. I am 111.5 miles from their tower - in the southeastern tip of Dorchester County (11 miles northwest of downtown Charleston, and 12 miles south/southeast of downtown Summerville). I am using a Winegard 7698, 42 ft above sea level. The relatively long wavelength of the VHF-13 signal works wonders for getting WBTW's signal this far. Bye-bye to that on ch.41, probably. On the other hand, most nights I receive WTEV (ch. 19) from Jacksonville, Florida, often up to 28 db signal-to-noise ratio. Their tower is only 1,000 ft tall. Having almost nothing but ocean between that tower and me works wonders.
I had read, back about April 20, 2010, at rabbitears.info that, in response to a change in the signal pattern of WLOS, WBTW would petition the FCC for an increase from 31.6 kwatts to 54.7 kwatts. WLOS' petition for the pattern change actually stated this. The FCC approved WLOS' petition by late July, yet I never saw an application at fcc.gov from WBTW for the power increase. Now I know why.