The 15W U-series powers Ultrabook, MacBook Air, the entry-level iMac, and the NUC. Compared to Broadwell-U, Skylake-U looks streamlined and is easier to understand. Actually - aside vPro chips - there will be just one i7, one i5, one i3, one Pentium, and two Celerons available.
✓ Core i7-6600U (2.6-3.4 GHz / 2C4T / HD Graphics 520 / vPro / 15W TDP)
✓ Core i5-6300U (2.4-3.0 GHz / 2C4T / HD Graphics 520 / vPro / 15W TDP)
✓ Core i7-6500U (2.5-3.1 GHz / 2C4T / HD Graphics 520 / 15W TDP)
✓ Core i5-6200U (2.3-2.8 GHz / 2C4T / HD Graphics 520 / 15W TDP)
✓ Core i3-6100U (2.3 GHz / 2C4T / HD Graphics 520 / 15W TDP)
✓ Pentium 4405U (2.1 GHz / 2C4T / HD Graphics 510 / 15W TDP)
✓ Celeron 3955U (2.0 GHz / 2C2T / HD Graphics 510 / 15W TDP)
✓ Celeron 3855U (1.6 GHz / 2C2T / HD Graphics 510 / 15W TDP)
Also coming early 2016, 28W SKUs with Iris Graphics...
