Has anyone tried using the retina 5K iMac's screen using Screen Sharing over a Thunderbolt Bridge? I have a macbook air and the only I was not buying a 5k iMac is that I like to use my laptop at work sometimes and would have to buy an extra monitor for it since the 5k iMac will not allow Targeted Display Mode. Is Screen Sharing over Thunderbolt a good replacement for that? I mostly code and write documents.. Thanks!