It’s a long game, not a short one; they aim to take away liberties one at a time and create a userbase that is dependent on their platforms. The first step is to start making the alternatives look nonviable - for games this means damaging Steam and converting users to the Windows Store, other types of application will follow (MS Office will also now deliberately screw up documents saved in older Office formats or open formats, where it worked fine in previous versions). The final step, perhaps 10 years down the line, is to remove access to anything outside of the store for the home edition of Windows. When that has been done, they have won and achieved their goals.