This is a hashed together Frankenstein Macintel just for developers to test code on. It's using the bare minimum that they can get away with to run OSX86 reasonably - bare bones integrated graphics (because they hadn't asked ATI/Nvidia to produce OSX86 drivers) and a standard BIOS.
From everything I've read, it sounds more like Apple are going to use Intel's
EFI which Intel are keen to move people over to (and who better to start with) since Apple will want to keep the functionality they had in Open Firmware. But since they haven't programmed the EFI, naturally it's going to have boot with an open BIOS for the moment.