Abbott and the State of Texas want a trial date in March of 2015. Some of the reasons given by Greg are really bogus http://txredistricting.org/post/67501564817/state-of-texas-asks-court-to-move-voter-id-trial-to

If the State were forced to alter or even un-implement a voting law after providing election materials and substantial training, the likely result is unnecessary and avoidable confusion at the polling place. Attempting to re-educate poll workers (most of whom are volunteers) on such a short timetable is simply not feasible, and the result would likely include confusion, delay, and possibly even inconsistent enforcement of Texas’ election laws.

Blocking SB14 would mean that Texas would go back to the old procedures and not require photo id except for first time voters.