I guess I just don't count that future as evidence of that happening. I'd say it's more likely that he gained it from someone else. We still don't know if multiple people can have the same power, which would seem likely. I would think that if Peter got his telekinesis from Sylar after that meeting, he would have used it by now...

I tell you, though. If that future episode was evidence of how many people would gain powers, it must be really tough for Peter. I'd imagine that he would just walk a few blocks down the street and pick up a couple powers right there, not even knowing what they are