From the pictures I saw on another website the PC HD version is not cropped.
As for it being just a cartoon, there are still benefits from HD because of the detail put into the drawing...like lines, zoom in, zoom out..etc.
I can see why someone would be dissapointed in not getting that..
But until I know for sure if the Blueray version does not provide a full screen version, then it is a guess.
DVD's on the other hand have pitiful resolution compared to the way it should be, and imagine delay is another problem.
Access speed can be slower then a Laserdisc depending on where the information is located. The analog tracks may be only a few spaces away on an LD. LD's can be very fast when dependent on this factor.
On the other hand an HD file on a computer would be almost instant if done right depending on ram and cpu power.
DVD's being compressed files would suffer. But yes it does depend on the player. A computer playing it might not be so bad.