I'm considering the possibility of getting this device for my iMac 21.5" mid-2011. I know my iMac only supports Thunderbolt and not Thunderbolt 2, but I do need the USB 3.0 and HDMI ports it offers. I'm just thinking about getting a new iMac in the future (> 1 - 2 years), and I could use this dock with it. My questions are: 1) Is Apple going to get rid of Thunderbolt and replacing it with something else? 2) Will Thunderbolt 2 be old by that time? Thank you in advance for your feedback.