Yes they are showing up on shelves but the full release is still weeks away if i recall. None the less you can find them now.
Trust...if you like minimates then you'll like these. They represent the natural evolution of the block based mini figure. Lego->Minimates -> Mega Bloks original HALO figures - > Mega Bloks new articulation micro figures (Call of Duty, Assasins Creed, 2014 HALO, etc).
I can only imagine what the next leap forward will bring.