Broadcom which until now refused to open their Wi-Fi drivers, has released their Linux WiFi Drivers under Open Source.
This is great for Linux users, as Broadcom was one of the few chipsets for which there were no open source drivers. While you could use Windows drivers on Linux using NDIS wrapper, it had its share of problems.
This should also help Broadcom as people can improve their drivers and fix bugs as well.
Two of the other major Wi-Fi chipsets: Atheros and Intel are already WiFi. Also most of the hardware today works out of the box with Linux. As far as graphics is concerned, Intel and ATI (AMD) have both open sourced their graphic drivers well. NVIDIA has good Linux drivers, however they are proprietary. Looking forward to them opening up next.