Even though Windows 8 comes with ICS (Internet Connection Sharing) feature to allow devices to connect to yours PC internet connection, it doesn’t allow creating a wireless network connection to share the internet.
This allows users to use router’s default or specified DNS server address to easily connect to internet. Windows 7 ad hoc connection feature does nothing except creating a shared connection with separate IP address to register the device on the virtual network. If you’re a power users, you might’ve noticed that Windows 8 doesn’t include an option to create and setup ad hoc network connection to share files and internet with Wi-Fi enabled computers and devices.
Apart from Start Orb and classic Start Menu, what most Windows 7 users, who decided to take Windows 8 for a spin, miss in Windows 8 is ability to create ad-hoc network.