[po]

If Dragon's Lair were created today, they would print the commands you're supposed to press on the top of each screen (similar to rhythm games). There is enough difficulty in getting the timing right that it would still be difficult and people would feed in more quarters. Maybe there would be an 'expert mode' to remove the command hints and get an alternate ending.

[reedlaw]

I remember the Amiga version would flash a light in the direction you were supposed to go, or in the case of the sword, make the sword glow. It was enough of a clue to get through many scenes, but often required too quick of a reaction to pass on the first go.

[egypturnash]

This was in the original version, too.