The Nokia Catwalk (codename) is supposed to be Nokia's first metallic Lumia phone.
Nokia may launch a new Lumia phone with codename catwalk on May 15 in London according to My Nokia Blog (via PocketNow). The Nokia Catwalk is supposed to be Nokia's first metallic Lumia smartphone. It would more directly compete with the iPhone 5.
Not much is known about the Nokia Catwalk besides that it is supposed to be very thin and good looking.
Microsoft and Nokia need a new hot phone to keep pushing to grow its still tiny market share.