As well as what Piru said, there's the practical side to consider. Even if by some miracle these Sharks come out and work with OS4, who's really going to pay close on the price of an AmigaONE motherboard (and probably more expensive than a Pegasos) for a PPC card? Think about all those horrible 1991 A1200 bottlenecks. PIO HD access (ARGH), slow memory bandwidth, the works. Why pay so much money for a card that's going to be able to reach about 20% of its true potential in an ancient Amiga, an ancient Amiga that could die any time soon?