Not entirely true. We are seeing more and more 4:4:4 stuff coming online. Yes a $100,000 SR deck OR a $25,000 RaveHD will handle it(sorry had to put the plug in)
If a client receives 4:4:4 material by means other than tape or if they generate 4:4:4 material there are ways around buying or renting the tape deck. There will be a deck needed at some point in the process but by whom is the question.
I do agree 4:4:4 is not for the meek and especially not for someone just getting into HD.