And there's more leaks today
"4:2:2 10bit 4K30p can be recorderd internally on SD. 4k60p will be reocrderd internally with 4:2:0 8bitThere will be two big firmware updates. One in April ( 1080/60p at 200Mbps with 4:2:2 10-bit and All-I). One by end 2017 for 4K/30p at up to 400Mbps All-I."