I've often pondered an RFID/microchip setup, but mostly for managing letting the horses in and out easier. I'd have RFID gates that only let the specified horse through (so horses can go in and out of their stalls- and only their stalls- at will). The BM could then just feed in the stalls (or they could do an automatic dispenser, going with the current theme
) without having to bring the horses in, could lock the horses in the stall if desired by turning off the RFID reader, turn all the horses out again by turning the reader back on, etc.
Putting multiple food sources out in the paddock is a good idea, though not a new one. Encouraging movement is great for the horse's health but I don't think it makes the arrangement any more natural. Horses in a natural environment go through periods of plenty and periods of scarcity, and I've yet to meet an owner who wants their horse to get skinny and ribby in the winter just because that's what horses in the wild do.