Of all the laptops that debut during the CES trade show every January, Lenovos tend to be the most interesting.For years now, the company has indulged in public experimentation, launching laptops with foldable displays, dual screens, and secondary e-ink surfaces. This time around, Lenovo brought out the industrys first laptop with a rollable display, which expands from a normal-looking 14 inches to an extra-tall 16.7 inches with the push of a button.A lot of companies bring wild concepts to CES, but Lenovo actually ships them, even when it knows they wont be commercial hits. (The rollable laptop, called the ThinkBook Plus Gen 6, will arrive in June for $3,500.) What does the worlds largest PC vendor have to gain by putting ultraexpensive, experimental products on the market? I asked the president of Lenovos Intelligent Devices Group to find out.[Photo: Lenovo]Learning experienceEven when Lenovo knows its weirder laptop ideas wont be instant hits, Rossi says they help the company develop intellectual property that it can use in the future, even in different contexts.As an example, he points to Lenovos ThinkPad X1 Fold laptop and its foldable Motorola Razr phone, which both arrived in 2020. Rossi says Lenovos work on laptops hinge design helped inform future Razr models, which became easier to manufacture at a scale. Lenovo has now shipped one million Razr phones, and Rossi says its now the most popular clamshell-style foldable phone in the U.S. (presumably beating Samsungs Z Flip line).Some of the learning from the laptop is here, Rossi says, gesturing to his Razr. Some of the learning from here is in the laptop.[Photo: Jared Newman]Lenovo released a second-generation X1 Fold in 2022, responding to feedback that users wanted a larger screen and more powerful processor. At CES, Lenovo also announced a new version of its Yoga Book 9i, which has two separate screens instead one big foldable display but borrows many of the same concepts. The company is still evaluating when to launch a third foldable model.If we realize that were failing, and this direction is not promising . . . well redirect the budget to something else. But thats innovation, he says.[Photo: Lenovo]Big trade-offsIn the meantime, Lenovos taking a detour into rollable screens with the ThinkBook Plus Gen 6. Whereas Lenovos foldable laptops contort into various positions with help from a detachable kickstand and wireless keyboard, the ThinkBook Plus Gen 6 works more like a regular laptopalbeit with a screen that stretches out to approximate a pair of vertically stacked monitors.Two years ago we brought a proof-of-concept to MWC, and nobody believed we could manufacture it. Now its here for sale, Rossi says.[Photo: Jared Newman]Like a lot of other Lenovo experiments, this one will come with some major compromises beyond just the $3,500 price tag. At 3.73 pounds and 0.78 inches thick, its considerably bulkier than a typical laptop, and Lenovos window management software seemed a bit crude in my brief hands-on experience. Early buyers will also have to worry about the durability of a first-of-its kind display technology.Perhaps for those reasons, Rossi isnt sure whether ThinkBook Plus Gen 6 will be successful, but he believes rollables have a path to popularity. When I ask why Lenovo doesnt just experiment behind closed doorslike Apple famously doeshe says the company sees value in bringing these kinds of early versions to market.If youre keeping it in the lab, you dont test the real market response, he says.