Both the Galaxy S8 and Galaxy S8 Plus are going to be announced on March 29 and will be shipped out bearing a 5.8-inch and 6.2-inch QHD Super AMOLED displays.
Both flagships are also going to be powered by either Snapdragon 835 or Exynos 8895 chipsets and both of these phones will also be IP68 certified and provide support for wireless charging right out of the box.
Since these handsets will support the Qi wireless charging standard, any Qi wireless charging pad will be compatible with both phones.