The same as the ending in "Threads" - Jack and Sam at the fishing pond having exactly the same conversation as before, but this time a fish jumps out of the water and O'Neill says "Close enough". It's been confirmed that nothing in the timeline has changed, O'Neill really believed for 8 years that there were no fish in his pond, but he was just wrong. :lol So all in all, "Threads" is the real season finale.
The back half of season 8 has been great. Reckoning I and II and Threads really felt like the ending of a story arc spanning over 8 years and the Jaffa scenes were quite moving.
And Archaix, you're way off.