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CNET.com: There’s a new standards war in town: HD-DVD versus Blu-ray. Both promise true high-resolution video and more features than the current generation of DVDs, but because the formats are incompatible, hardware manufacturers, movie studios, and now you the consumer have to choose sides. HD-DVD is first to market, with movies and players out now. Blu-ray movies land May 23, and players will arrive this summer. The DVD switch will also affect PCs: several manufacturers will start shipping systems with Blu-ray drives, which will work via third-party software, over the summer, and Microsoft promises native support for HD-DVD drives in Vista machines, launching in January. Furthermore, Sony’s PlayStation 3 will include a Blu-ray drive; that console hits stores in November. Read on for CNET’s complete guide to these competing DVD standards, plus the latest news and product reviews.