According to AppleInsider, the new iPad 2 will be a thinner device with two cameras (similar to the iPod Touch), with an anti-refective screen. However, resolution will remain the same:
“The improvement of iPad 2 display,” the report notes, “focuses on thickness and anti-reflection, not resolution. iPad 2 display module is 30~35% thinner than iPad 1 and it’s helpful for better form factor.