The tracks in Collins St have been extended very slightly further toward Bourke St this weekend.
It looked like they were only laying track up to ~30-40m beyond the existing ANZ/Myer stop, I assume planning to finish it later, when they complete the road. A crossover was being constructed immediately after the existing stop, so obviously this is where trams will be terminating for now.
So I wonder why they didn't build it like this in the first place in 2009, instead of having to remove all old track from beyond the existing stop? Continue double track into the construction area, and use a crossover instead of a single track terminus?
This would have been similar to what was done for stage 1 of the extension, from Spencer St to Batman's Hill drive, where double track was laid across the intersection but remained disconnected until stage 2. Trams terminated at a wooden platform stop constructed on track beyond a crossover, which incidentally was back in use this weekend.