This image comes from HTC, they mentioned this is the "optimal viewing distance and angles"
http://www.htcdev.com/images/uploads/devcenter/S3D-03b.png
What do you think? Do you feel this is the best angle and distance?
http://www.htcdev.com/images/uploads/devcenter/S3D-03b.png
What do you think? Do you feel this is the best angle and distance?