Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of media-connection technologist Silicon Image (Nasdaq: SIMG) went out of focus today, falling as much as 12.2% on fairly heavy trading volume.

So what: The company doesn't have any news of its own today, but that doesn't make this drop meaningless: Apple (Nasdaq: AAPL) and Intel (Nasdaq: INTC) just demonstrated their Thunderbolt high-definition display technology at a trade show.

Now what: A new industry standard for high-quality media connectors is indeed a scary proposition for Silicon Image, which lives and dies by the HDMI standard. With heavyweights like Intel and Apple pulling the strings, Thunderbolt might even stand a chance in the open market. This is a long-term concern, since it'd take awhile for even the best marking teams in the world to replace or marginalize the deeply entrenched HDMI standard.

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