Good news: no, you don't need special bindings. The 2x4 pattern uses the exact same bolt layout as the standard 4x4 pattern, so any binding with a standard 4x4/2x4 disc will bolt right on. Almost all non-Burton bindings include this disc.
The "micro" part just means your board has more insert holes — spaced 2cm apart instead of 4cm — giving you finer control over your stance width. Instead of adjusting in 1cm increments, you can dial it in by 0.5cm. That's handy if you're picky about exactly where your feet sit.
In practice, you mount your bindings the same way. The extra holes simply give you more positions to choose from when setting up. So shop for bindings based on your riding style and flex preference — the 2x4 pattern won't limit your options at all.