Where are the wireless speakers?

If the technology industry is so wonderful, how come it can't resolve one of the prime headaches of home entertainment: speaker wires? It's a question that has bedeviled many interior designers.

It turns out it's a basic problem of electrical engineering, according to a representative from Samsung's home theater department. Speakers need an amplifier, and amplifiers need a wire for power. Sending electricity through the air isn't realistic, and batteries die. Some have made speakers that receive audio tracks via radio signals from the amp, but the quality is iffy and the speaker needs to be plugged into the wall anyway.

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Microsoft demos wearable holograms on HoloLens

Microsoft shows off holograms you can hold with a mixed-reality game called Project X Ray. The new game runs on the company's HoloLens platform.