Well, it's all how you look at it. Parts of some existing roads were paved over by the toll roads. (FM620, MOPAC, 1325) They're still trying to toll SH183, Loop 360, SH71 (E and W), US290 (E and W) It's not over.
I hadn't heard about turning 290 into tollroad. I did see that it was getting built up. I figured it was to finally bypass the lights used by local traffic (as was done on the Houston end some years back).