As of today, September 11th situation is as follows:
1) Kurds/SDF have, with support of the US-led coalition, launched an offensive on the last |S|S stronghold in Euphrates Valley (town of Hajin - near the border with Iraq)
2) Russians and Syrians launched last week an air campaign to either (1) bomb rebels into submission in their last stronghold (Idlib province) or (2) to soften the defences for a ground offensive.
3) Turkish, Russian and Iranian presidents held a meeting to find an agreement on Syria, but it seems that they failed to find a compromise. While the meeting was held, Russians halted bombardment, but then resumed.
4) Turks have brought in reinforcements into Idlib (they have a number of observation posts and checkpoints on the perimeter of Idlib province). Whether Turks will or will not resist Russian-Syrian offensive, remains unclear.
So far, 35,000 Syrians have left their homes and try to flee from Idlib. The number of refugees may well exceed a million if Syrians and Russians decide sweep the whole Idlib province.
In essence, we are seeing a final act of Syrian civil war - if Russians and Syrians seize Idlib, there will be no rebel areas left and the uprising that began in 2011 will have been quelled.
What happens to Kurds, is anybody's guess, but so far the US has not clearly stated that it will abandon them. I'd speculate Kurds and their independence aspirations may be used as a bargaining chip to press Turks to abandon procurement of Russian missiles and behave as a NATO member. This would fit Tump's way of conducting foreign policy.