The two NUCs aimed at the consumer market would include a Broadwell CPU, integrated graphics, and offer support for USB 3.0, an M.2 SSD, a consumer IR sensor, and replaceable lids for both wireless charging and near-field communication (NFC).
Note the differences in the two depicted M.2 SSDs. The M.2 connector can have different keying notches denoting various uses of M.2 modules. I am planing my next NUC build and will keep a close eye on Intel's compatibility list.
The consumer Broadwell-equipped NUC board kits will come in Core i5 and Core i3 variants, both based on the Rock Canyon design. Rock Canyon promises support for both 2.5" SATA and M.2 solid-state storage devices replacing the existing mSATA connectivity, built-in and non-optional Wi-Fi and Bluetooth connectivity.
I hope the built-in and non-optional Wi-Fi is incorrect. I hard wire everything. Have no use for Wi-Fi.