Seems FINALLY Ms have learned their lesson from the disastrous experiment of Windows 8. W8.1 was better but IMO also not really suitable for a lot of Enterprises or other areas which relied on the classic desktop.
W10 is definitely "Enterprise" useable - and the new consumer bits which grab the best of W8/W8.1 will make a welcome re-appearance in the next set of builds.
I Love the idea of "Live tiles" on the desktop -- That was one feature from the old VISTA that I was sad to see go in W7 (Gadgets). People use multiple monitors quite regularly as a matter of course these days (even Home computer users often have THREE !! or more) so not forcing everything into Full screen mode is also the correct way forward too.
Seems Windows 10 will re-establish Windows again as the world's best selling and most used OS once more.
Looking forward to the future builds and the REAL final release(es).