MSI will be releasing Kaby Lake NUCs. These are a fanless design, which is promising.
The specs can be found at MSI site (Click Here)
They will be silent. They will have an impressive set of ports. However, unfortunately, these will be 7th generation Kaby Lake generation chips. MSI is not specifying which chips, but it will be dual-core, as it will be a U chip. To see Intel Ark’s list of Kaby Lake Mobile Chip specs: (Click Here).
DDR4 2133MHz up to 32GB (2 slots)
1 x M.2 SATA / PCI-e auto switch SSD
1 x 2.5” SATA HDD or SSD
USB 3.1 Gen1 Type-A x2 (left one supports super charger)
Mic in/ Audio jack x1
USB 3.1 Gen1 Type-A x2
HDMI (1.4) out x1
DP(1.2) out x1
Intel® Dual Band Wireless-AC 3168 (M.2 2230)
Source: MSI Specication Page
No Thunderbolt-3. And no Kaby Lake-R. This is a bit of a disappointment.