Main thing that's different is that storylines used to be the backdrop in RPGs and they unfolded as you played. Now they are the centerpiece, and they get shoved down your throat. I think the old way was more interactive, because even though the plotlines were skimpier and the technology was cruder, the player usually at least had the ability to make his own decisions about what he wanted to do and when he wanted to do it. The new interactive movie format is so set-in-stone that nothing the player does is an expression of his own free will. The player does what the story requires him to do, and there's no other option. Chinese menu style dialog trees don't change that. I think game RPG designers have become entirely too dependent on storyboarding their games as if they're doing a movie, and then adding in the actual GAMEPLAY as the glue that connects their prefab storyline events. It's an inherently wrong-headed approach to an interactive media.
I was a harsh critic of Bethesda with their vague "kill foozle" plots with a bunch of random stuff you could sandbox your way through on the way there back in the days of Arena and up through Morrowind, and I was a big fan of Bioware's storytelling in the days of BG1 & BG2. But Bioware has become too invested in their sub B-grade movie footage that nobody would bother watching if it was in TV show format, and they've forgotten that gameplay trumps all in a GAME. Bethesda on the other hand has added quite a bit of depth to the stories in their games to the point where Fallout 3 (and even moreso, New Vegas) are much closer to what I want in an RPG than any of the shit Bioware has cranked out lately. It's a shame, because Bioware has been so close to getting it right but they end up so very far away by the time they are done. A game assembled mostly from mini-miodules like the ones they did for the "origins" stories in DA would be pretty damn good. Instead it's all "cutscene->(dialog)help_me_obi_wan_you're_my_only_hope->trash mobs->scripted encounter->cutscene->(dialog)you-re_so_special_move_along_now" in chapter/verse format.
Fuck em. They don't get it. They never will get it. Why do people worship at the altar of the clueless so much in this industry? All the people who knew how to make great games and who actually had the talent and the drive to do so left the industry a long time ago. All that's left now is corporate hacks and useful idiots, lording it over some keyboard monkeys who'd just as soon be coding SQL and Java for an insurance company.