Personal computers with high-resolution visual displays come in a range of sizes, from those small enough to be embedded in clothing and jewelry, up to the size of a thin book. Cables are disappearing. Communication between components relies on short-distance wireless technology. High-speed wireless communication provides access to the Web. Visual and auditory virtual reality is built into eyeglasses and contact lenses (which paint images directly onto the retina) and equally discreet auditory devices. These virtual reality experiences and environments are available from the Web. People can enter virtual environments at any time, and can be in real and virtual environments simultaneously. These are primarily limited to visual and auditory virtual reality, but early-stage technology to interact through the tactile sense is also available.
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