The first official keyboard and mouse for the Xbox is $250 and only works with 16 games

Apart from the price and game availability, there's a whole debate whether a keyboard and mouse for consoles is a good idea.
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You can now play Xbox-only console games on PC

TL;DR: Microsoft now allows Xbox Insiders and Game Pass Ultimate PC subscribers to stream select console-only games via Xbox Cloud Gaming, expanding access to over 250 titles without installation.
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Xbox app for PC now lets you browse, install, and play games from your Steam library

TL;DR: Microsoft's updated Xbox app for Windows PCs and handhelds unifies game libraries from Xbox, Steam, Epic Games Store, Battle.net, and GOG into a single interface. It enables seamless browsing, ...