Hi @cnada,
Since none of the underlying simulators/hardware devices support batching, unfortunately you’ll still have to provide a batch of inputs manually (e.g., with a for loop).
A more intensive option (taken by fellow user @rooler) is to manually create a simulator which automatically handles batching 
(see here).
We do have on our roadmap to provide batching support in PennyLane. This would require either that a backend provider exposes this feature, or that we build our own support in PennyLane’s own simulators. But for the moment, you’ll have to use the old-fashioned option mentioned above.