As there is a chance that the impeachment will actually see Trump convicted this time, he could realize that pardoning himself at this point might not hold (as could be the case for other actions that he has and will take after the 6th). In truth, pardoning himself is a bit of a longshot to begin with. That said, relying on Pence to pardon him after Trump sicced some madmen on him just a week ago might be a little bit chancy itself. He might decide to go the "no pardon" route and hope that he can get a quick flight to Russia.
Now that I think about it, there might be some more historically noteworthy days to come.