I would say for your use-case it's absolutely not worth the extra. I have the NUC5i3RYK and it's plenty fast for everything I need it for (1080p video and live HD TV watching and recording barely even put a bump in it). I'm never going to play games on this one, but to be honest I wouldn't with any of this fifth generation dual core boards. Fast & plentiful RAM and SSD really make more of a difference in day to day usage. I mean, it boots Win 8.1 from cold in 6 seconds - how much quicker does it it need to be? And I have to try really hard to get even close to using all 8GB of RAM.
My advice would be to stick with what you have for a year, and if at the end of that it's notceably slowing you down any to the point of annoyance, then upgrade ... to Skylake
I wanted to come back and share my hardware installation and performance feedback.
The hardware installation was pretty simple, however I have to say my 2.5" Intel 330 SSD *barely* fit in the bay. In fact, I had to bend the clip that holds the SATA wires in place to get the drive installed. The software side was a little more problematic, but it appears it has nothing to do with the NUC.
The SSD was from a Lenovo T400. I did not want to go through the hassle of a reinstallation, so I figured I'd give the Sysprep option a shot. I ran Sysprep (OOBE, Generalized, Shutdown). Everything appeared to be in order. However, Windows 7 refused to boot after moving the hardware to the NUC. I tried the various Safe Mode options, but the result was the same - Registry appears to be missing or corrupt and a Repair installation will be necessary. After some trial and error with my Windows 7 Upgrade DVDs, I get a pop-up telling me there appears to be a problem with the boot loader. The message says Windows can fix the error, so I gladly click OK. After that, I install the drivers and all data and programs are retained from the installation on my T400.
I'm very happy with the performance! Thanks again!