It wasn't going to happen. Console games were already staying at $60, while PC games are still at $50 for the most part. The bullsh#t inflation of dev costs is mostly due to marketing (IIRC, activision spent something like 50% of their COD:BO2 budget on marketing). They aren't giving that money back.
This wasn't about offering a deal consumers, it was about control. On PC you have Steam, Origin, gamefly, GMG, GOG, etc.... there's a crapton of digital delivery platforms, and they're all competing. With Microsofts plan, every game (even physical copies) were essentially digital copies that you bought from them. They got their share, cut out p2p used game sales (craigslist and ebay) and "offered" an offical used game sale through Gamestop, Best Buy, etc where they can tack on a transaction fee. Couple that with the fact that their touted "family sharing" was nothing more than a
timed demo (remember when we used to get
real demos?), and there was actual appeal to what they were offering.