"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Low End PowerMac G5?
The new PowerMac G5 will be a low end single processor 1.8GHz machine with 256MB of RAM, 80GB HD, GeForce FX 5200, and SuperDrive for $1499.
The new machines provides Apple with a lower end "headless" Mac. In comparison, the (less expandable) 1.8GHz iMac with built-in 17" LCD is also priced at $1499.