Well I told you it wouldn't
The only differentiating factor between i5 and i7 is HT. If you really want to future proof for whatever, you'll need X99. I'm not saying that a 4670k or 4770k isn't going to be enough in 5 years, but the difference in price just isn't really worth 4 virtual threads. Especially when you can have a 5820k which is a 6 core with HT for about the same price as a 4770k or 4790k. The only bad part being, X99 boards are more expensive and DDR4 is new and more expensive. If you buy parts the longer you wait the more prices will come down for DDR4. Buy the RAM last and you'll get the cheapest price on it. For the price though, 2 extra physical cores and HT IS a differentiating factor compared to the i5 when dealing with something like Premier. The hard work on Photoshop is done via CUDA these days, so grab yourself a nice Nvidia card and you're golden there. FTP clients, meh.
SSDs do more than help startup times, they are literally better than HDDs in every way besides cost. Since you're set on that I won't elaborate any further.
So really it's up to you what you decide you want to do. If you want to utilize the 4K monitor I suggest getting a video card first as you can use that in your current rig.