So now we have Prop Guard, Prop Gold, Prop Glop, Prop Speed and we also have many others in development by the paint companies rather than other parties. Pettit has Prop Coat. There's a product called Steel-It and one Prop Armor and Velox Plus Prop Paint.
I'd stick to what you can find yards with experience using for at least a couple of years as just like anti-fouling paint, application is likely to be very important. I know some require indoor conditions, some can be done anywhere. They require different application techniques and different time to dry.
There will be more paints, probably an increase in ceramics. For now, we're staying with what has worked for us.
Be careful with a yard pushing something new very hard. Just be aware they've probably got a financial incentive to do so.