Shocker650: What if Steam would have never existed, and Games for Windows Live, would have remained the main platform for PC games?
GFWL wasn't "the main platform for PC games" at any point though. In fact it didn't even launch until 3 years after Steam (2007). Lookup the list of GFWL titles on PCGW to see fewer than 100 games (out of 100,000 PC games ever made) ever used it and very few of those were GFWL exclusives. That digital game stores sprang into existence post-broadband uptake was a given, however the launch of Steam itself in 2004 didn't specifically "save" anything with early 2000's gaming as
1. There never was an early 2000's PC gaming slump to begin with and
2. You still couldn't even buy most 2004-2007 non-Valve AAA games like Far Cry 1, Oblivion, etc, on Steam until they were belatedly added in 2008-2010.
At the end of the day (and subject of the thread), it's disingenuous to portray Steam as some
"Consumer Champion Against Unwanted Clients" when that's literally the whole 2004 Steam 'Origin Story'. Whether people like Steam or not, their store was invented on forcing the use of a client for HL2 and their biggest growth period (typically 2009-2013) came precisely from "bait & switching" discs in retail copies (aka, forcing the use of a client...) so they can't exactly turn around to other game developers and say
"Hey, don't do what we did (twice over)"...