Is there a feature list for this card? Do you think about additional features you didn't have in mind yet?
There are additinoal, not-yet-published features, but your question is asking for things I haven't thought about yet. Do you see the chicken-and-egg nature of your question :-)?
Regarding power and features: where will this card be ranked compared to TF1260, Warp1260 and V1200?
TF1260 and Warp1260 are surely ranked below the ACA1240/1260, and the V1200 is hard to compare - it doesn't use the original CPU and won't offer any FPU, so it's hard to compare. If you're looking for GFX, then you might be happy to know that the ACA1240/1260 has a fast expansion port for a GFX subsystem.