The state ranks at the bottom when it comes to voter participation. Texas is a red state, and republicans will see to it that it stays that way with: voter ID laws, unfair redistricting, and the lack of same-day voter registration. The Christian Science Monitor has the list of top 6 states with the highest voter turnout. Most of those states have same-day registration laws in place, and Oregon voters vote by mail.
Julian Castro, and Wendy Davis have gotten quite a bit of national attention. Perhaps they can appeal to apathetic voters, and help the state's left make strides in helping to turn Texas blue. Apart from that I don't see things changing.