Dual Screen, touch screen, HD, motion controls, analog sticks on controllers, rumble, all these things are/were considered gimmicks when they came out.
Some of them have pretty much become standards (HD, DA, dual screen for DS and touch screen for the new handhelds).
Today's gimmick when used well usually become tomorrow's standard.
People like to throw around the word gimmick all the time like it's a bad thing.
Gimmicks are one of the things that moves gaming forward so it doesn't get stale.







