I think they will make him an Immortal for, as much as anything, his nearly peerless rep career (and so many of those being rep victories) and number of accolades.
You can talk up Farah as a close competitior, and for a while Farah was certainly Smith's peer, but Smith has played nearly 100 games more than Robbie and is still top of his game (they are the same age).
Farah won Dally M hooker of year twice ('07, '10) and almost won Dally M overall twice, but Smith has won Dally M hooker 6 times, Dally M once, Dally M rep player 4 times, Dally M captain twice and Golden Boot 2007.
I'm not a massive fan of the bloke but he'll play 400 FG games before he's done; nobody's close to that, and he's done it all - captained at every level, won convincingly at every level, hardly missed a game. In fact since 2003, 15 completed seasons, Smith has only missed something like 35 games total, averaging 2 per year, and I expect most of those are due to Origin. Win rate of 70.81% all-time.
And two contracts in one season… Is there nothing the bloke can't do?
Phenomenal