I remember seeing a heated visor in a Schuberth accessory catalogue a few years ago...no idea they were ever sold here, or if they worked!

next will have a video in the lid so you can see behind and reversing bleepers

Yep they worked very well, i had one on my Schuberth C1, but they were about 12mm thick double glazed. When it went wrong, about 14 months old
(BTW it was a gift as no way could i afford one) it was over £100 to replace so i bought the normal one

Just been to the Reevu helmet demo. They even let me take one of their helmets away for a test ride!

Wasn't overly impressed...the field of vision wasn't that great and its pretty hard to see much. The idea that its in your peripheral vision rather than something you stare at, but its only of much use when traffic is at close quarters - if the car behind is much more than 20 yds behind, you can barely see it.

It probably didn't help that my head didn't seem to fit the helmet very well.. the medium was too large and the small too small! The guys were always desperately trying to adjust the mirror so that I could see something in it! The helmet itself was nice enough, quite comfortable.

So, not for me. Try before you buy, or just try one if you get the chance. It might suit you better.