The Seattle-based internet retailer is the king of ecommerce, but it has its sights set on becoming the king of retail, period. And though it has a long way to go before it sees the kind of yearly sales that the current leader-of-the-pack, Walmart does, the 42.5% sales growth it posted in 2011 isn’t a bad way to play catch up. And though Amazon’s bottom line has somewhat disappointed Wall Street recently, the firm is focused on investing heavily in future growth. That means rolling out products like the hugely successful Kindle Fire at rock bottom prices, and aggressively expanding beyond its base products like books and electronics into any product that can conceivable be sold online.