It pretty much looks like he'll move on in the summer. Overmars has stated that Eriksen isn't interested in signing a new deal, and the player himself responded by saying he'd like to keep his options open. His contract ends summer of 2014, so Ajax will have to cash in on him sooner rather than later.
It's going to be a transfer race of Hazardous
alveshat
proportions, but I honestly have no idea where he'll end up. Hopefully Spain, but I don't think he's quite good enough for either us or Los Merenques, and I don't see him settling for the likes of Atletico or Valencia. England perhaps then? Not sure how his style would suit the PL, but then again, so many brilliant technically gifted foreign players are dominating on english soil at the moment, so why not Eriksen too?
Anyhow, I'm looking forward to seeing him play where ever he ends up.