Elon Musk certainly knows how to steal the thunder from his competitors. While other automakers are gearing up for big announcements at the New York Auto Show this week, the Tesla Motors chief just tweeted this:

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Major new Tesla product line -- not a car -- will be unveiled at our Hawthorne Design Studio on Thurs 8pm, April 30 — Elon Musk (@elonmusk) March 30, 2015

Is this the big rollout of Tesla's new battery tech to power your home? Or something totally unexpected from the mad Musk?

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