Tide Pods are finally rolling out in the US. Walmart stores have started stocking the single-dose laundry packets, which were supposed to make their debut last year, but the launch got stalled over solubility issues. But with that problem behind it, P&G execs say they are creating a $300 segment within the US laundry detergent catgory. Still, the long-awaited launch of Tide Pods still faces some hurdles. First is the launch of competitive products from the likes of Church & Dwigh...