I doubt they'll be worth the wait. You can unlock 2 cores and get a 1055T at no extra cost and you have AMD's turbo implementation.
But:
- For a purely gaming PC, these two extra cores are a waste of power.
- Turbo's use is limited. If you overclock, you don't need turbo. But for gaming, you don't even need to overclock a modern quad core.
Feel free to wait, but I wouldn't upgrade at all. If anything, try overclocking or even unlocking your 550. A 550 at stock can keep up with a quad core in most cases and overclocked it can go all the way. Save some money for an SSD, that's the only sensible upgrade possible for your build.