The Power of Two Bishops

Recently I played a corresponding game at chess.com. It is one of the games I played in a Semi Slav thematic tournament. At the end of the game, my two bishops completely dominates the board. Below is the PGN and an embedded PDF analyzing the game.

[Event "12th Chess.com Thematic Tournament - Semi Slav (1801-2000) - Round 1"]
[Site "Chess.com"]
[Date "2011.08.01"]
[White "BennyNevis"]
[Black "whily"]
[Result "0-1"]
[WhiteElo "1768"]
[BlackElo "1876"]
[TimeControl "1 in 3 days"]
[Termination "whily won by resignation"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 {Thematic Game - This is the starting position.} 
 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.a3 Bd6 10.O-O O-O
 11.b4 a5 12.Rb1 axb4 13.axb4 Qe7 14.Qb3 Nd5 15.Nxd5 exd5 16.Bd2 Nf6 17.Ra1 Ne4 18.Bc3 Nxc3 
 19.Qxc3 Bxb4 20.Qc2 g6 21.g3 Bd6 22.Kg2 f6 23.Nd2 c5 24.dxc5 Bxc5 25.Bxb5 d4+ 26.Kg1 dxe3 
 27.fxe3 Qxe3+ 0-1