Here are the specifications for the Miix 3 8 and Miix 3 10. Not much is known yet. But here are the most important things you should know for now.

The Miix 3 will arrive in Europe 26th of November 2014

Miix 3 8" Miix 3 10" Display Size Display Resolution CPU RAM Storage I/O Port Audio Integrated Camera Battery AC Adapter Operating System WLAN Bluetooth Accessories Weight Software
7.85" 10.1"
768x1024 * 1280x800 * 1920x1200
Intel Z3735 Intel Z3735
max 2GB 1333MHz max 2GB
32GB eMMC * 32GB eMMC 4.5 * 64GB eMMC 4.5 * 128GB eMMC 4.5
* 1x Micro USB port * 1x Micro SD card slot * 1x Micro HDMI port * 1x Micro SD card slot * 1x Micro USB 2.0 port
* 1x Earphone connector * Speakers (0.5W) * 1x combo audio jack * Speakers (2W)
* 2MP Front * 2MP Rear * 2MP Front
15.8Wh Polymer 25Wh Polymer
5.2V 10W 5V 10W
Windows 8.1 * Windows 8.1 * Windows 8.1 Pro
802.11abgn dual band 802.11abgn dual band
4.0 4.0
* Keyboard dock
0.83lbs / 374.5g 1.21lbs / 549g
1y free Office 365 1y free Office 365