What "player" are you talking about?
This is the Denon AVR-4306 thread isn't it? Maybe you posted your question here by mistake?
For what it's worth (nothing really), Toshiba HD DVD Group advisor, Mark Knox, has reportedly said that HD DVD players will be software updateable, but it is not yet known for certain that updating to HDMI 1.3 will be a software switch or whether new hardware will be required. I think that Knox's statement might qualify as being a definite "maybe".
Shane C. Buettner has reported: "All we know for now is that it's (a) dicey time to be buying a new disc player or a new surround sound processor or AVR, and formats themselves aren't likely to be only points of confusion facing consumers as HD DVD and Blu-ray come to market."
Wait and see? Or, flip a coin... Seems like anyone who claims to know the answer to your question is full of baloney.
My question is: which came first... fried chicken or scrambled eggs?