Classic games reduced to highlights

I would never play through the entire Super Mario Brothers again, but if I could replay the last bout with Bowser and relive the ending, that would be mint.
Same with Final Fantasy 1; get me straight to the battle where my characters get all grown up, and then take me straight to the last battle.
Why isn’t there a service that makes this possible? I’d buy more XBL Arcade remakes if they supported this and might actually care when Wii classics were released if they let me jump around.
This list could go on forever! Anyone got a favorite classic gaming moment they’d love to relive but don’t have the time to replay the whole game? With emulators and ROM states this should be totally possible, but I’d love to see a pretty package.
