Credit: Supplied by AcerTL;DRAcer has announced the Project DualPlay Mini concept handheld.This device looks like a conventional handheld but opens up to deliver a netbook-style experience, complete with a physical keyboard.Acer also unveiled the Predator Atlas 7 handheld PC.Acer is no stranger to handheld gaming, as its Windows handhelds have been around for a while. Now, the company has revealed its new Predator Atlas 7 handheld, along with a radical concept handheld.Starting with the concept device, Acer has unveiled the Project DualPlay Mini handheld. This gadget looks like a large Windows handheld at first, complete with all the expected controls. However, the device opens like a laptop, revealing a large, backlit physical keyboard. The 8-inch screen also swivels inwards to complete the laptop/netbook transformation.