Thanks for that Jeemo,
What are the chances of SecureBoot becoming available and what is the story behind that?
Highly likely. The RoL team has already released the exploit for Windows RT devices, and have publicly stated that the mobile version is being worked on and that they're planning on a release soon (there was no specification of how soon). In order to implement the exploit, we need to have the ability to access an elevated CMD prompt on the device. Snickler at XDA has gotten that working, and Gustave (@gus33000 on twitter) is integrating it into Interop Tools (check twitter for progress). I'm unsure about whether or not the implementation of CMD access will work with our device, but if it does, we're all set for bypassing SecureBoot. If it doesn't, I've talked to a few people involved and they will work with me and a couple others with the device to make necessary changes.
I'm also going to comment on the physical factors between the SE and the Icon, as I currently have them right next to each other in front of me. I've gotten very used to the SE over the last year and a half, and I think it is incredibly comfortable. The SE is lighter than the Icon, and the form of the SE fits much more comfortably in my hand. The Icon looks better, and it feels like a more refined product when it is in your hand. The screen and glass quality on the Icon is superior to the SE. In terms of performance, they seem to be identical. The SE has a significantly better speaker on the back. The Icon has significantly better recording, in terms of photos, videos, and audio. Neither of them are perfect, but they're both ******* awesome. I honestly believe that my past 2 months on RS1 on the SE have been the best Win10m experience available, on any device (and yes, I've tried the 950), however I had to make various changes that go beyond the scope of this tutorial to get to that stage. As long as they support your carrier's bands, you will be happy with either device. The Icon has more publicly available research, and most user-friendly tools for tweaking are made for Lumia, not Samsung. The Icon will be the easiest route to Win10m, but you could get there on the SE if you're willing to put in the time.