With the leap to 64-bit operating system support, the Raspberry Pi 3 is taking a serious step forward, and Microsoft is pushing its Windows 10 IoT Core operating system as a serious rival to the more familiar Linux variants used. While Samsung has also launched its $99 Artik developer board this week, the Pi is the much more interesting proposition for potential IoT (Internet of Things) developers, as the Windows stack is a direct line to the Azure cloud computing platform – a dream that would have been nearly unthinkable a decade ago. The most notable hardware addition is the new integrated WiFi and Bluetooth functionality, which until now has always required a USB adapter – which occupies one of…