A leak suggests the next generation of Intel's chipsets support PCI Express 3.0. VR Zone's Chinese site has posted a series of slides indicating that next year's "100 Series" chipsets will support PCI Express 3.0.

To summarize what you'll see on the slides, Intel's flagship member of the family will be the Z170, which seems to have up to 20 (!) lanes of PCIe Gen3 connectivity.
Most of the lanes appear to be shared with the chipset's USB, SATA, and Ethernet interfaces.

The slides also show the Z170 with up to three PCIe storage ports, three SATA Express ports, and 10 USB 3.0 ports. Each PCIe storage link can have up to four lanes, while the SATAe connectivity is limited to two.