Well, I do not see new kernel for RPi3 at GitHub. Will RPi3 use the armv7 kernel? No idea. Strategy is to follow what Raspbian is doing. In 1-2 weeks I will release a 7.0 update due to new glibc and few minor changes as 7.0.1 and will update boot files. We are using a conditional config.txt with PI1, PI2 sections. Will it work with PI3? So, waiting at the moment also waiting to invest to RPi3 board. But help is welcome from the community in testing if one gets a hardware.
BTW, Raspberry is pusing new hw when a new ODROID appears. It happened with RPi2 and now RPi3 is pushed by the new $40 ODROID-C2 not to loose user base:
http://www.hardkernel.com/main/products/prdt_info.php?g_code=G145457216438* Amlogic ARM® Cortex®-A53(ARMv8) 2Ghz quad core CPUs
* Mali™-450 GPU (3 Pixel-processors + 2 Vertex shader processors)
* 2Gbyte DDR3 SDRAM
* Gigabit Ethernet
* HDMI 2.0 4K/60Hz display
* H.265 4K/60FPS and H.264 4K/30FPS capable VPU
* 40pin GPIOs + 7pin I2S
* eMMC5.0 HS400 Flash Storage slot / UHS-1 SDR50 MicroSD Card slot
* USB 2.0 Host x 4, USB OTG x 1 (power + data capable)
* Infrared(IR) Receiver
* Ubuntu 16.04 or Android 5.1 Lollipop based on Kernel 3.14LTS