Yes, it's a little unusual: Cooler Master's new Arc ($TBD) is the first stand we've seen marketed towards both MacBook Pro and iPad users, relying on a combination of glossy black plastic, soft gray rubber, and metal to hold either a thick laptop or a thin iPad on a desk. The idea is apparently that you'll either place your MacBook Pro inside the larger, wider groove and leave it next to your computer, upright, or slot your iPad into the smaller,…