It only matters if you need to use more PCIe lanes than the Z68 chipset has available.
Unfortunately, it does not appear that Intel has upped the number of PCIe lanes available with next year's upcoming 7-series chipsets, so waiting would be of no benefit either.
i7-4790K @4.2GHz, GIGABYTE Z97X-UD5H-BK, 32GB GSkill RipJaws PC1866
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Samsung 850 EVO 500GB, WD Raptor 600GB, WD Black 1TB, NEC 7200 DVDRW
Gigabyte GTX 1070 Founders Ed., X-Fi Titanium, Dell 2408WFP-HC