Let me put it this way. I think BTC will be used for big businesses for large money transfers to replace wiring money. LTC will be used by the general public's day to day transactions. Think about this for a second, you go to a restaurant, pay with BTC and wait 30-60 minutes for confirmations(If you get real unlucky you could wait an hour for 1). Or you wait 5-15 minutes with LTC.
i was thinking about htis for a drivethrough or something
LTC would work
you come up and PREPAY over the amount you know you would spend.
then you can leave as soon as you're done and expect them to send the change back after you leave as a restaurant can't go anywhere in the short term so you're safe to assume they'll send your change if they want your business again; not to be sued, not to be shunned etc.
litecoin is just fast enough for this and bitcoin is quite too slow for it
of course all we'd need is a third party system like (Gox codes) to transfer insantly but we'd have to trust said system and obviously million+ pepole trust bitcoin a lot