@@There will always be new hardware just around the corner so no point in quibbling about it, if you want to upgrade go for it, if not then wait a bit longer.
I've upgraded most of mine at the end of last year but I'm leaving my graphics card until this years chips come rolling out. My GTX 590 can soldier on for a while longer.
Went from an i5 2500k on a Z77 Mobo with 8Gb RAM (1600) to an i7 4770k on a Z87 mobo and 16Gb RAM (2400), not overclocked anything yet but I suppose the legit question would be, Have I noticed a difference? Absolutely not! but then again I don't really care, I had an itch to scratch ;)