Keira Knightley as Guinevere ready for battle. I think that the Picts could have gone to battle in very light armour such as these, but in the case of the women, the breast protectors would've wanted to protect all their breasts, not to show them off. That's not the aim of a breast protector! Apart from that, it's realistic for a very light warrior.
Practical Female warrior - notice that they are actually covered in protective armor, not decorated in useless bling! <- *claps* Eowyn is the ultimate female warrior. She's just fantastic. As for the rest - yes! I was /so/ bugged in Eragon that the lady had a little metal feather in her hair instead of a helmet. Ridiculous.