This isn't an exciting new feature. Its a fix to a problem with the API.
If you look at the ESRI ArcGIS JavaScript API documentation you'll see:
FeatureLayerView.queryFeatures() and GeoJSONLayerView.queryFeatures() results do not include the z-values when called in 2D MapView even if returnZ is set to true.
What is up with that? There's lots of instances where I would like to be able to have access to my data's z-values even if I'm querying it clientside via a 2D Map. I can see why this capability might be disabled by default but not why its not possible at all.
I would like to know if this is under consideration for future versions and if not, why not? What's the obstacle?
PS> Also, why isn't there an arcgis javascript api category?
