I got the TB version. The only reason I'd consider non Touch is the battery life. Non is more of a MBA replacement as advertised, 10+ hours battery. However for my use, the battery is more than enough. If battery is not your top concern (or the +$300), TB usage is a game changer. Well at least the Touch ID at this point. Think how much it changed your behavior on your iPhones. Also, the TB itself is becoming more and more useful as I get used to where the efficiencies are.
Regarding the question about "future proofing" if there is such a thing, you must maximize the RAM and SSD and get the TB. The RAM and SSD are soldered and will not be upgradeable like past Macs, except the SSD on the non Touch. The TB hasn't even scratched the surface of functionality yet, especially Touch ID. I see it's potential already with the little I use it now. My opinion. Don't flame me for having an opinion that may differ from yours. Of course +$300 is not insignificant. But if you really cared about absolute price, you wouldn't be using Macs. But you love the OS and the design and build like the rest of us.
Regarding the question about "future proofing" if there is such a thing, you must maximize the RAM and SSD and get the TB. The RAM and SSD are soldered and will not be upgradeable like past Macs, except the SSD on the non Touch. The TB hasn't even scratched the surface of functionality yet, especially Touch ID. I see it's potential already with the little I use it now. My opinion. Don't flame me for having an opinion that may differ from yours. Of course +$300 is not insignificant. But if you really cared about absolute price, you wouldn't be using Macs. But you love the OS and the design and build like the rest of us.