The Pixel Kings give you control over flash power in groups (as with Canon's built in flash control system), but now the Pixel King receiver defines the group for the flash mounted on each PK receiver.
So a Pixel King + 270EX II means you can have all the benefits of radio wireless link, and put the 270 into any group. It's still just a smallish flash, so you may still need a bigger beast for some things, but where you don't need too much power, these little flashes are small, light and only need to AA batteries.
