That may or may not be true. Just because the new consoles will have 8 cores, it doesn't necessary mean games will be optimized for 8 cores. Console chipsets don't really compare well to PCs since the architecture of the chipsets can vary greatly.
That said, at that price point, you are pretty much talking a Intel 3570k or a AMD FX8350. Should you wait is really up to you. New Intel and AMD chips are coming, but if you are just gaming, likely any current chips will be fine for the next 3 years or so. If you are going to wait, I would suggest a Intel Haswell chip with a z87 chipset motherboard.
Tim