I read completely the opposite from that. By no new features, I assume they mean you don't get any extra features if you run it in snow leopard (which should be the case, since 64bit and opencl should only provide speed increases).A review on FCP7 over on MacWorld says the following:
"While Apple states that there will be performance benefits from running Snow Leopard with Final Cut Pro 7, no new features are enabled by running it."
This sounds to me like 64-bit and Open CL support aren't in this release which seems to confirm my earlier comments and also puts a lie on that "report" from FCP7 technical support (a post from a user on AppleInsider reported that Apple technical support had told him that 64-bit and Open CL were supported in FCP7 -- which now seems to NOT be true).
Plus a guy over at Appleinsider apparently called them up and Apple confirmed openCL and 64bit support.