Well, since they're meant to replace class abilities, and class abilities generally > feats, I think they're in fact better than feats.
IIRC, it's being mentioned that Spring Attack might become a talent in 4e, because it introduces a new mechanic, as opposed to what feats do ("making you better at something").
So if Spring Attack is, say, a rogue talent, something like Bounding Assault ( PHBII ) might be a feat, making a spring attacker better at something he can already do.
Just my 2 cents.