I think it will be a new chapter in the Clark & Lana relationship. They will be completely sans secret between them, for the first time. They have been through a considerable amount together over the years, and a little togetherness and comfort, even happiness together will be well deserved. Although at the same time, the seeds of seperation will probably also have to be laid out this season. So it'll be tricky. But interesting I hope. And whatever happens, I hope it's a worthy progress and eventual culmination of the relstionship. As the premiere 'ship' of the show, they deserve it.
I am really hoping that whenever Lana returns next season, she can take on a kind of emotional anchor role with Clark.
With Almiles don't bet on it..
t:
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when do you think they'll get together? 
Lana know knows, (or maybe once she comes back and they can really talk,) why Clark refused to sleep with her, so maybe she can.....ease his fears