Is there currently any way of using your iMac as a TB display? I am buying a 27" iMac next year and wanted to do this. I understand that it may seem pointless but I might want to use my work on the air on the bigger screen. My tv is too big for this. I know there are other ways around it but it would be nice to connect the air and the iMac imo.
Googled it, and it does seem like the new TB-equipped iMacs support Target Display Mode by thunderbolt. In other words, you should be able to connect yout TB-equipped laptop to it and use it as screen (though the iMac would have to be running to do this).
Though if you have an iMac for screen, it would make more sense to use the iMac instead of the docked Air as it's several times faster