Details about those new gaming PCs are scarse at the moment, but Lenovo's press release says:
Lenovo will employ its system design and engineering expertise, while Razer will enhance the immersive experience for gamers. All forthcoming Lenovo Razer Edition products will be co-branded and reflect the edgy Lenovo Y series look and feel with iconic Razer elements like customizable Chroma lighting effects.
Lenovo added it will also team up with Razer to help develop "new technologies, including gaming experience enhancements." The first PCs from this partnership will officially launch in early 2016 during the Consumer Electronic Show in Las Vegas. Razer already sells its own lineup of high-end gaming PC laptops.