Of course, to play console exclusive games. If there were no console exclusives, then buying a gaming pc/laptop would be all we need.
Let me make it a little more clear.
Most avid PC gamers are not buying a console for exclusives, they just don't want consoles or maybe they live in region where consoles expensive, whatever.
There are many software sales to gain by supporting PC, MS has concluded that's more significant than potential console sales to lose. During the 6th and 7th gen I think there was genuine concern about sharing games with PC, but they must have figured out supporting PC has little if any impact on their console sales.
In fact, Sony shares many of its 3rd party exclusives with PC. Why would they do if it hurts their potential console sales? Maybe the money they save by allowing that isn't impacting their console sales enough if at all.
Ever since MS's PC support and Gamepass stuff began they've boasted about software sales improving and user activity in their games has increased. Unsurprisingly, you can reach more people by supporting PC as well. The people interested in playing MS games is not a finite number of people that actually buy Xbox consoles.
Gears 5 for X1X (5/5) - Mortal Kombat 11 for X1X (5/5) - Doom 64 for N64 (emulator) (3/5) - Crackdown 3 for X1S/X1X (4/5) - Infinity Blade III - for iPad 4 (3/5) - Infinity Blade II - for iPad 4 (4/5) - Infinity Blade - for iPad 4 (4/5) - Wolfenstein: The Old Blood for X1 (3/5) - Assassin's Creed: Origins for X1 (3/5) - Uncharted: Lost Legacy for PS4 (4/5) - EA UFC 3 for X1 (4/5) - Doom for X1 (4/5) - Titanfall 2 for X1 (4/5) - Super Mario 3D World for Wii U (4/5) - South Park: The Stick of Truth for X1 BC (4/5) - Call of Duty: WWII for X1 (4/5) -Wolfenstein II for X1 - (4/5) - Dead or Alive: Dimensions for 3DS (4/5) - Marvel vs Capcom: Infinite for X1 (3/5) - Halo Wars 2 for X1/PC (4/5) - Halo Wars: DE for X1 (4/5) - Tekken 7 for X1 (4/5) - Injustice 2 for X1 (4/5) - Yakuza 5 for PS3 (3/5) - Battlefield 1 (Campaign) for X1 (3/5) - Assassin's Creed: Syndicate for X1 (4/5) - Call of Duty: Infinite Warfare for X1 (4/5) - Call of Duty: MW Remastered for X1 (4/5) - Donkey Kong Country Returns for 3DS (4/5) - Forza Horizon 3 for X1 (5/5)