Movies-of-books, no. There the usual amount, methinks. Fewer, even, though the comic book adaptations have filled that space.
There definately are more remakes going on, though. It's a fad, a few successful remakes in a row and now everybody's doing it. Same with the (just weird) number of TV show adaptations. It'll pass in a few years.
As for the sequals: Perhaps. I don't think there are more sequals now, as much as we're having more successful sequals. Back in the day a sequal equaled suck in 96% of the time. Now, it's more like 50/50. Of course, when every non-sequal is a major adaptation or remake of some kind, you just notice them that much more.