Aw, that's nice that Rory is making Logan a birthday cake. Though will it be eatable?
And E/R and Paris will be there too, good news.
And since Lorelai's letter only made Luke to be Rory's father "sort of", I don't think it's that meaningful and Lorelai said herself she was exaggerating in Luke's favour… And since we know to whom Rory went to with her problems concerning her future and Lucy, not Luke nor Chris, but Richard, this case is closed for me so to speak.