While we're dreaming, here is what I'd like to see.
A popup box with forward and back buttons split up into 4 main areas:
1. A game diamond showing the current game status - linescore, # of outs, runners on base (runner names would be nice, but not necessary).
2. Play-by-play box - no modification needed from what's currently in each line of the game summary, except that it displays one line at a time as the forward and back arrows are pressed.
3. A pitcher box showing the current pitcher, throws L/R, his ratings, and current pitch count.
4. A batter box showing the next batter, bats L/R/S, and his ratings.
Pitcher and batter stats would be nice too, especially if they were updated at-bat by at-bat, but I realize that would take a lot more programming and data resources than what would likely be available to be implemented, and I would still be very happy with what's above.