When the previous "Targa" was introduced it featured not a detachable roof and angled "roll bar" but instead it was a glass roof panel that slid backwards below the rear window.  It looked weird, was not a real "Targa" but  the rear window could be opened with the roof panel forward. So what it really was was a hatchback 911 with a wierd roof line and a large sliding glass roof panel.

The 991 Targa will have a detachable roof panel and will debut at the Los Angeles Auto Show.

I hope they offer it with green tinted glass as standard instead of the grey windshield tint band that seems to not look good with any paint color.