Of course it's biased -- Would you for example expect NIKON to promote CANON Cameras or vice versa. Similarly BMW to promote FORD or FORD to promote BMW. !!!
I'd be worried if Ms WASN'T biased in favour of its own products. !!!!!
I'm actually looking forward to it too. After the W8 fiasco I'd almost given up on Windows. W10 seem IMO to be doing the right thing -- back to your CORE users - and by all means add on new features for the modern devices. If you alienate your CORE market you might just as well pack up.