The Yoga Solar PC features a solar panel built into the laptop’s lid.

Lenovo, the world's biggest PC maker, has a history of showing off imaginative concepts with some becoming reality.

Lenovo has a history of showing off weird and interesting new product ideas at trade shows. Remember the laptop with the rollable display from a few years ago? This year at MWC it's doing the same thing, with a host of unique, fun, and downright silly ideas, some of which could inform designs and decisions for future products.