Currently in the Views Display, you can only choose a field to be displayed as the "description" which can be used as the body of popup. There should be another option to render out the fields like in a normal view. This is currently a feature in the 1.x branch. I think it is very useful if you want to just include a few fields, as well as being able to leverage more Views theming.
FAILED: [[SimpleTest]]: [MySQL] Unable to apply patch allow-views-display-to-render-all-fields-in-the-description-748646-48.patch. This may be a -p0 (old style) patch, which is no longer supported by the testbots. View