Been waiting for this one too, have you had time to test how well the tracker works behind the lockscreen yet Paul? I will try it out tomorrow on my daily walk to work.
Small uptake of 8.1 could be down to the issue with it not showing in store for quite a few.
For instance we replaced 10 PCs, with touchscreen all in ones just before Christmas and so far...
They must have heard you're rant yesterday on WhattheTech ;)
The new Xbox one solves enough of the issues I had with the 360, but since I am not a big gamer I will wait for the first price drop.
Things like walking into a room and saying on, is...
The bit that worries me the most is the battery life, hope this fairs out better than you expect.