A professional answer about a business situation

Your manager has asked your team to come up with a more effective way to highlight product features for the customer. Your team determines that your idea, a mobile optimized site comparing product features, would be beneficial and easily accessible for the customer and is the right idea to take to your manager. However, Dan, a team member, is reluctant to accept the idea in team meetings. When you present the idea on behalf of your team to your manager, halfway through the presentation Dan says, ‘I don't think this will work since customers don't use our mobile app anyway. How useful can the site even be if they don't shop on their phones?' Your manager and team turns to you and waits for your response. In 500 words or less tell us how would you respond to Dan and why you would choose that response.