Think about the market. MS doesn't have to sell Windows to business; it's already well-entrenched. Where it has problems is competing with operating systems already established in the tablet market. Hence the consumer-oriented ads.

It's the same as the smart phone market. When was the last time you saw a phone ad that demonstrated the product being used as anything other than an entertainment device? Anybody that NEEDS one is going to buy one (or have the company buy it). The slice of market up for grabs are those people who WANT one. They're the ones who need convincing.