"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Apple Releases OS X Yosemite 10.10.1 With Wi-Fi Reliability Improvements
The new software is available through the Software Update mechanism in the Mac App Store.
The OS X 10.10.1 update is recommended for all Yosemite users. It improves the stability and compatibility of your Mac. This update:The update should fix several major issues that users have been seeing with OS X Yosemite, including a major Wi-Fi issue that’s caused connection problems for a number of users.
- Improves Wi-Fi reliability
- Improves reliability when connecting to a Microsoft Exchange Server
- Improves reliability sending Mail messages when using certain email service providers
- Improves reliability when connecting to remote computers using Back to My Mac.