What is it exactly that you are waiting to hear about? I don't think there are any hidden features we don't know about Acer's Chromebook...both models are pretty much identical as far as specs go, it really just boils down to screen size and HDMI vs VGA.
If you ask me, im waiting to hear about chromebook hardware issues. Samsung is a trusted brand and I have experience with their products and it's always good. Acer on the other hand, probably is good too but I stick with what I have faith in.
Who knows maybe the Acer ChromeBook will be better than the Samsung.
You are right about all the information about the chromebooks being out, but now it's about finding hardware issues or anything related.