Despite regularly updating Win 7, it never suggested me the free upgrade, I must have too much unsupported HW and SW.
Most probably XP and 7 will remain the best seller Windows versions ever on PC.
About Windows in general, Android and iOS tablets are replacing Windows PCs for casual users a lot faster than Windows 10 is expanding on phones and tablets, and despite being given for free on PCs already using recent previous Windows versions.
This said, Windows 10 will almost surely be more successful than Vista and Win 8.x, even on PC alone, and despite growing slower than competitors, it will probably be more successful than most previous Windows versions on mobile devices too, if not as market share, at least as number of licenses sold, so profits should keep on growing even if market share won't.
Stwike him, Centuwion. Stwike him vewy wuffly! (Pontius Pilate, "Life of Brian")
A fart without stink is like a sky without stars.
TGS, Third Grade Shooter: brand new genre invented by Kevin Butler exclusively for Natal WiiToo Kinect. PEW! PEW-PEW-PEW!