Most of the high speed connection (10GigE+) for the last 3+ years have already been fiber, and anything longer than 100m is always fiber - it's pretty rare to see copper used for anything faster than 1 Gig connections.
Yup, and, ironically, my last 10Gig deployment (2009) was 100% copper from the server to the switches - but it was a pain in the butt trying to get it to work, and I don't think I would ever try doing anything but fiber between my network elements for 10 Gig.