Warp drive looks more promising than ever in recent NASA studies

Original article [Oct 2012]: http://www.gizmag.com/warp-drive-bubble-nasa-interstellar/24...

Previous discussions:

https://news.ycombinator.com/item?id=4534359

https://news.ycombinator.com/item?id=4542210

Does measuring space curvature with interferometer even work? It assumes that light travels in space like a litlle ball on stretched rubber sheet. What if light is the line drawn on the sheet? Was that ever conclusively disproven?