Sony has been demonstrating a number of fuel-cell concepts, ranging from portable power units to rechargers and even home speaker systems that have their own methanol power-source. Of most interest are the two devices seen here, which may look like retro radios but in fact combine a rechargeable Li-Ion battery with a methanol fuel-cell.
A USB port allows you to recharge your phone, PMP or other device from the fuel-cell, with it automatically switching between using just the methanol or both that and the Li-Ion pack depending on the power requirements. Excess power from the fuel-cell component is stored in the Li-Ion battery.
Meanwhile the larger, home charging unit (which looks a little like a set of kitchen scales) has two USB ports but works on pretty much the same principle. Sony also demonstrated some cordless home stereo speakers, the hybrid fuel-cell component of which could apparently keep them powered for a year from a single refuel.