Yeah, and it's great when a game does it. It's just that - some games desperately need it, and don't have it. Even though getting a New Game Plus working is a cakewalk compared to ten seconds of cutscene or action sequence... In some games it could actually a bad thing - such as Beyond Good and Evil, where every collectible was relevant to the story, and the whole fun of photographing was getting them all in the first place.
The only game I can think of that would seriously benefit from New Game Plus is Deus Ex: Human Revolution. And you actually can do that on PC, you just need to use the debug console patch for Burger Menu, then you could give yourself all your former abilities/weapons/items. And you could start from any point.
I don't see how cutscenes/action sequences even apply to this. The simple matter is that some games would just become broken. Red Faction Armageddon isn't even a challenge the first time through, and it almost becomes a chore of spamming abilities once you got New Game Plus and start unlocking cheats (as you'll unlock nearly every upgrade on your first playthrough).