The Judge, Mrs Justice Lang, deferred her decision. So we now wait for the outcome, which could take up to a few weeks.
If Stroud's challenge is successful, the Secretary of State (now no longer Mr. Pickles following the election) will need to retake his decision. This could either reaffirm the planning permission previously granted by Pickles or, hopefully, reject it.
If Stroud DC's challenge is unsuccessful, there will be nothing left to do via the standard process to stop the incinerator.
You can read more about the High Court challenge in the following press articles: