I thought the higher-end players were going to be compatible.
As long as the player has at least an Ethernet port, it should be upgradable.
Because of the format the whole operation is heavily dependent on software unlike regular DVD players, its almost like looking at the two as Windows vs. Linux, or like what is on the store shelves now is Windows 95 and the future Bluray discs will be 98, XP, Vista etc.
Bottom line is that its too buggy even the high dollars players require a periodic download. I am staying away from the whole mess and I am perfectly happy with my up converting 1080P regular DVD player.