Unless it's done really well and used properly, I think it's a major case of style over substance.
If anything, I think it could be better used more subtly. For example, a steampunk site that has cogs and gears that rotate when you scroll.
But for a full on website, it makes it incredibly hard to scroll and scan, because nothing's fixed into position. It's telling that on the demo site, the actual content at the bottom has no animated elements.
Not to put it down or anything, of course. I think the worst example I've seen is the SWTOR page (can't find the link anywhere). It feels like it was done just because it's trendy.
If anything, I think it could be better used more subtly. For example, a steampunk site that has cogs and gears that rotate when you scroll.
But for a full on website, it makes it incredibly hard to scroll and scan, because nothing's fixed into position. It's telling that on the demo site, the actual content at the bottom has no animated elements.
Not to put it down or anything, of course. I think the worst example I've seen is the SWTOR page (can't find the link anywhere). It feels like it was done just because it's trendy.