Now, I'm very hostile to instant, omni-present fast travel in general, but I'm a bit in hurry right now and I won't start an argument about why it shouldn't be in any decent, respectable RPG, or why alternate systems (moongates like in Ultima, teleport gates, teleport runes like in Gothic/Risen) are infinitely preferable.
Maybe in my next replies.
That said, I really would like to implore CD Projekt RED, if they really want to go down for that road, to *at least* design the whole game pretending instant teleport wasn't in.
Why? Because it's not actually "optional" as people pretend it to be. It usually has a huge impact on pacing and quest designing.
That's exactly why you have games like Skyrim that forces you to travel huge distances for the most trivial bullshit ("deliver this wooden spoon to the toothless granny on the other side of this continent"), because they take fast travel for granted so they don't bother giving content a decent distribution in space or a good pacing.
P.S. Added a poll just for the sake of it, even if I don't tend to trust "popular response" too much.