Xbox One - Q&A about Features

Will digitally downloaded games be able to be pre-loaded before release, so that they're simply unlocked and ready to go at 12:01am on the day of release? 

MARC WHITTEN, CHIEF XBOX ONE PLATFORM ARCHITECT: Not at launch, but you’ll see us do this and much more over the life of the program.

If I sign in to Xbox Live on my Xbox One, will I also be able to sign in on the same account on my 360 at the same time? Say someone is using the Xbox One in the living room and I'm playing my 360 in my bedroom. Will I be able to use the same account? 

WHITTEN: Yes this works! You’ll be able to be signed on with the same gamertag on both an Xbox 360 and an Xbox One console at the same time. However, like today, you can only be signed into one Xbox 360 and one Xbox One at a time.

Given that Rep (Reputation) will now factor into Xbox One's online matchmaking (whereas it didn't before on the Xbox 360), will everyone's Rep be reset to provide an initial playing field? Since there are new rules, shouldn't everyone be able to demonstrate themselves as good players right from the start? Or will players be penalized for past mistakes? In other words, will previous account infractions carry over to Xbox One?

WHITTEN: We will not carry over any of the 360 reputation scores into the new Xbox One reputation system. The majority of members will start fresh at the “Good” player level.

We will be working with the Xbox Live enforcement team that has identified a small subset of members that have recently had enforcement actions taken against them and set those members reputation to an initial “Needs Works” level. This will give those members a chance to prove they can participate on Live fairly, and are not automatically placed in the “Avoid Me” classification where things like SmartMatch filtering will affect them.

Will Xbox One work as a Windows Media Center Extender? For those that use a PC with TV tuner to record and watch TV, we use the 360 as an extender to stream this content to TVs. Will this continue with Xbox One?

WHITTEN: Xbox One isn’t a native Media Center Extender. We’ll continue to work to enable more ways for everyone to get the television they want over the life of the program.

Much much more at the source.  Some of these are puzzling.

Source: http://www.ign.com/articles/2013/08/05/ask-microsoft-anything-about-xbox-one