Having now taken this flight (and returning later this week), I'll follow up for anyone who might search this later:

ABC DEFG HJK

The AC outlets are, indeed, on the left side of the AB, EF, and JK seatbacks. D and H could presumably share the E/J outlets, but for C and G to do so would be less practical unless travelling with someone you know. All seats have USB ports that worked well to keep my Android phone charged while I watched some videos on it and took some pics.

The 10-wide seating causes 2 problems -- I'm not a big person, nor was the person next to me, but the seats and aisles are noticably narrower. If my shoulder wasn't touching his, I was getting hit by people walking down the aisle.

The other issue is that the 777 seat tracks are set up for 3 or 5 seats in the center section -- with 4 the underseat space is offset weirdly -- a very narrow (3-4") section next to the aisles, then 3 misaligned larger sections for the 4 seats. I had to scrunch my backpack so it didn't go much into my neighbor's footspace.

The ICE widescreen system is very nice though -- I especially liked the feature to show what your neighbors on either side are viewing, in case they found something better than you did :-)