Well, if Fiji turns out being a dual GPU config will really bummer me, but I guess it's not that bad if they put extra effort in making it work seamlessly... I really hope they get a decent single GPU out of it in any case.
IIRC fiji was supposed to be a dual gpu card, then the subsequent batch of rumors suggested that fiji will be single gpu, the next batch chaned litho from 20nm to 28nm and so on. fiji being dual gpu makes a lot of logical sense if you consider the other aspects of the gfx card - dual gpu means vram is counted together and we know that 4GB is the current spec (per gpu). the a.i.o. hybrid l.c.s. also makes sense since the gpu(s) will be 28nm. 2.5D package config will be highly beneficial for dual gpu cards for reducing physical footprints, layering etc. the pcie power inputs and card tdp also make more sense.
now the stuff that don't make sense to me. the first one is the radeon core count 4096 - how is it measured? each gpu has 2048 and armed with HBM or is it 8192 cores? we know that the cooling subsystem will cost around $100-150, two high end gpus (read gfx cards) will be uh.. $350-400 apiece...? so 8GB HBM comes to $150-250? this would make building cheaper single gpu or cutdown versions much easier yet we'll be flooded with rebrands.
all of these with plenty of Native Client.