The likelihood of the wheelbarrow is pretty high. As to the others, I remain skeptical. Roman technology was good, but it wasn't ASB.
What I think we will see filtering through in years to come is the realisation that technology and social organisation in Roman times was a lot more pervasive than most people believe today. Roman archology for the past decades was drawn that way by two developments: One, the influence of a minimalist school that held the ancient world must be understood as an exploitative system in which all we view as its culture was enjoyed by a tiny minority, skimming the tiny surpluses of a vast mass of impoverished serfs or slaves. And two, the findings of archeological research into the "barbarian" peoples on its borders that we continually find to have been far more sophisticated than was previously thought. Romans, studied by the same archologists, turened out not to have been too different from their barbarian neighbours (not surprisingly, given they were neighbours). Whenever evidence of the sophistication of Roman technology turned up, it tended to be viewed as a one-off thing, or even taken for granted. Very few archeologists studied the Roman world by the methods used to study Germans or Britons (we are only now seeing the first large-scale study of latrine sediment from Roman Italy). I fully expect us to get a very different image of Roman society in its core areas.
For one thing, I would like the minimalists to show us some evidence of the 90%+ huddled masses that allegedly inhabited the Roman world without leaving any appreciable archeological record.