The same Steam that sells new games for half the price and regularly has 6 month old games for half again?
That's awful.
You rarely see new games half price on Steam and cheap 6m+ games is hardly exclusive to Steam. The majority of my 360 games were bought very cheaply and almost all of them new.
Then go buy it from a retailer or other online store - you have a choice do you not. Or use steam when the game is 6m+ old and benefit from some decent pricing and specials. If the publishers are driving this through you can bet those AAA titles are going to be £40-£50 and with no other options (2nd hand market) gamers are going to have to pay through the nose to play them
How will it be any different on the Xbox One? We will still have the option of buying online, or popping to a shop, exactly the same as Steam. Publishers can set the price online, but not in the shops. Exactly the same as Steam.
The 360 will have a 2nd hand market, admittedly it will be a gimped one. Exactly the same.... Wait no, I cant sell my Steam games can I?
Seriously, getting hold of new games will be exactly the same as steam, but loaning/selling will be more permissive on the Xbox One. I know I shouldn't blaspheme but Gabe (peace be upon him) is not the patron saint of gamers.