The annual Consumer Electronics Show kicked off in Las Vegas last night with tech products both glitzy and green. Laptop cases made from corn instead of petroleum products are on display, as well as devices that help electronics only suck electricity when being used, universal chargers, easily recyclable batteries, and solar-powered cell phone speakers. Sessions include “Evolving Environmental Strategies,” “Issues Related to Lead-Free Rework,” and “Going Green — the Eco-Technology Opportunity,” and organizers plan to offset the event’s emissions. Unrelated to the greenness but impossible to avoid mentioning: Bill Gates kicking off the festivities with a series of sketches about his potential post-Microsoft pursuits, including rap star: “Big pimpin’ I’m Bill G! Big pimpin’ yeah you know me.” Watch your back, MC Rove.