Here's the current chart (made today):



My prediction is that we don't deal with the blocksize limit until after we experience another growth spurt (assuming one happens).  If the Metcalfe relationship holds, it will look like the bitcoin price "bounced" off the TX limit and a credible argument could be made at that time that growth has become hindered by bandwidth.  I'm personally not worried at all about the blocksize, as I'm confident we will find very strong support to do the right thing if the need arises.