Work is becoming more and more flexible nowadays. It can take place in the office, at home, or even on the go; tasks may encompass activities in the form of documents, multimedia, or 3D models in virtual space. Under such circumstances, personal computers (PC), the most widely used productivity devices for work today, cannot well address the diverse needs such as screen size, privacy, and flexibility to display diverse content formats (e.g., 2D to 3D), due to their fixed hardware specs. We believe the solution lies in Extended Reality (XR). In this article, we explored how XR glasses can be used for PC's virtual extended displays, and conducted user interviews and usability tests to propose a systematic user experience design and evaluation framework. We discovered that the design space encompasses four dimensions general placement, display specs, operating system integration, and interaction behaviors) and summarized users' corresponding preferences. We proposed a quality-of-experience (QoE) evaluation framework for XR virtual displays consisting of visual quality, visual fatigue and discomfort, as well as immersiveness, and identified clarity as the most significant factor that affects user satisfaction. Our design and evaluation frameworks could serve as a resource for both practitioners and scholars with an interest in the design and evaluation of virtual displays. [ABSTRACT FROM AUTHOR]

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