Act as a [chief marketing officer] with [10+ years of experience in digital innovation] specializing in emerging technologies. Craft a comprehensive strategy outlining how [augmented reality (AR)] will revolutionize marketing practices by [2028]. Include specific examples of AR applications in [retail, e-commerce, and experiential marketing], and explain how [personalized customer experiences], [enhanced brand engagement], and [data-driven insights] will be achieved. Discuss potential challenges such as [technological adoption rates], [privacy concerns], and [integration costs], and propose solutions to overcome them. Conclude with a visionary statement on how AR will redefine [consumer-brand relationships] and drive [long-term customer loyalty] in an increasingly digital world.