Paul, it will be interesting to see what you think of the Kupa Ultranote X15 when it's released.
8GB RAM, 128 GB SSD, Intel Core i5 or i7, removable battery, 10.1" IPS 1920 x 1200 digitizer...
The battery life indicated depends on what you're doing. It will go up and down depending on the type of activity and what you are connected to. My Samsung 700T tablet does a similar thing.
Apparently the Surface Pro does NOT include WiDi because it does not have an Intel Wireless chipset. So WiDi would need to be done with a USB dongle.
It does have NFC.
It might have WiDi. Certainly the processor and graphics card support WiDi, so it just depends on the WiFi adapter included.