After the white pincer black has the option to jump out to the center. However he should not be tempted to play this keima before jumping out. There are 2 reasons for this
First of all the keima destroys his potential as it is not an urgent move. Black could have invaded the corner at the 3-3 point later on in the game, or gain sente when white adds a move to defend his corner against invasions of that kind.
Secondly because of this exchange white gets a stronger position and know he can make a bigger extention (at W4).