According to Chinese tech analyst Pan Jiutang the Snapdragon 810 chipset may premiere in either the Oppo Find 9, Xiaomi Mi5 or Vivo Xplay 5 with the latter having the highest chance to come first when taking the launch cycles of the others in regard.
Being first isn't the most important thing as we're bound to see the rest of the flock follow suit in a timely manner but in this case Vivo could premiere Qualcomm's potent 64-bit chip by the end of the year or early next year - December 2014 or January of 2015.
The Snapdragon 810 chipset is an interesting addition by the chipmaker Qualcomm. Like its inferior Snapdragon 808, it uses ARM's big.LITTLE architecture and goes for four Cortex-A57 cores and four Cortex-A53 ones. The chip switches between one or the other to provide a good balance between power and efficiency.
What's interesting is that Qualcomm strongly believed that better cores are more important than the sheer number of cores. Times change, we guess.