Interesting, Hardware Unboxed didnt mention the scan lines in their review of the original G7 but talking about them as a common issue in this video. I still get them even at 60hz.HU review. of the new Neo G7. Look at 5m in for the knowns.
Am waiting for a 'product support specialist' to get back to me from Samsung but expecting them to say 'its just how it is and not a fault'. So off putting though.