Hi everyone! I'm an iOS app designer looking for some insight on what my next computer should be. I have a MacBook Air 13" connected with a 27" Thunderbolt Display, that is my daily workstation and it works great. The Thunderbolt Display is a must, I just can do actual work on the air by itself, I might do small things like email, some front-end coding, but when it comes to design I do 100% of it on the Display. Now, for the months I've been wondering if I should get the rMBP. A lot of designers say that "once you go retina, you never go back" and I think is 100% true is the laptop is your entire workstation. I'm worried that having a retina display (rMBP 13") connected to a non-retina (Display 27") won't be the best idea as my eyes will be battling around with 2 different resolutions. I would bet that things won't look very good on the external display once you see them on a retina one. So my question; Is there any rMBP + Thunderbolt Display user who can share his/her experience? Do you see significant difference from dragging one window from the rMBP to the Display? Thanks in advance.