I do not know what Austin ISD's plans are in this area. I do know that 15 or so years ago, my district included a hands-on requirement for one of the science benchmark tests. They quickly abandoned the practice, I assume because it was difficult to grade in a standardized way.
We now have a new standardized test (the STAAR test) and I have heard that, at least in the upper grades, it will make the move to an online format. Don't know about any hands-on component.
Utah uses "technology enhanced items" on our state science tests. These items are basically a simulation of some science principle or experiment. Students demonstrate understanding by how they manipulate the materials in the simulation.
The demo for teachers and students begins by showing a model roller coaster. A video of a real roller coaster ride is then shown (on the same track). Students are again shown the roller coaster track "model" and asked to click on the point where "kinetic energy" is greatest. (A variation of the question asks where the "potential energy" is greatest. There are many clickable points and I believe the question is scored based on proximity to the most correct location.