Driver controlled darkening sunroof

[Mazda MPS]

Haven't seen this before but though it might be of interest:
http://youtu.be/B_iW2Nf7Nlk

Sunroof glass where you control the amount of light that get's though.

Andy

[BuzzLightyear]

Believe that is now an option on Mercedes cars, called Magic Sky or similar.

Good idea IMO.