It depends. Samsung has promised a pretty big Jelly Bean rollout: SGS3, SGS2, Note, tablets and even some phones going directly from Gingerbread to Jelly Bean without stopping at ICS (e.g. Galaxy Beam).
If they keep those promises (and that's a big if, of course), they'd be one of the better manufacturers. In particular, I think they'd be the only manufacturer taking some 2011 devices all the way from Gingerbread to Jelly Bean.
Personally, I expect at least the SGS2 and the Note because those devices have gotten new life with their LTE versions, but we'll see.
