This will be effective at 12:01 a.m., Saturday, August 4... TSA will require travelers to remove "large electronics" including "large" video games, video cameras, DVD players and CD players from their carryon and place them in trays for inspection. Thanks for the warning, Kipper - now how much you want to bet that at the stroke of midnight all the screeners will be in accord as to which mini-DV cams, games, etc. can be left in carryon, which must be removed?
See
http://www.portseattle.org/seatac/ to see what SEA says - and think how you can avoid hassles this weekend, by not carrying "large electronics" in your carry-on, being prepared and being aware many summer travelers will probably cause queue backups with this sudden new rule.
Do you feel safe yet?