Thinking about your competition
Product: Companies that heavily weight product or service decisions based on what their competition is doing usually end up chasing the pack rather than leading it. Competitor comes out with a bigger widget, you come out with a bigger widget. It's possible to survive doing this, especially if you bring other value (a bigger widget that works better, etc.), but you risk being too late to market and always behind the curve, being perceived as a "me-too" company with less value to the market, or making/offering the wrong products or services. Just because other companies are doing it doesn't mean it's right for you.