Normally, when summoned for jury duty in California, you had to go to the courthouse and wait almost an entire day before you were selected/dismissed. Sometimes, you get selected but not put on an active jury, and then you have to hang around there longer to see if they actually need you as a substitute juror for the duration of the trial 
Now, they tell you upfront if you are on standby, and you only need to physically go to the courthouse if you are selected the day before:

A big improvement over the old system. Anyone know when they started doing this in CA? Is this how it works in other states?

Now, they tell you upfront if you are on standby, and you only need to physically go to the courthouse if you are selected the day before:

A big improvement over the old system. Anyone know when they started doing this in CA? Is this how it works in other states?