The 3DS XL has a 4.88 inch upper screen, for a 90 percent larger viewing area than the 3.5-inch top screen of the current 3DS model. The bottom screen is also larger, at 4.18 inches.
The Japanese and European versions will ship without AC adapters as a money-saving measure (really!), as they are compatible with existing 3DS and DSi XL power adapters. It is currently unannounced whether the North American version will include a power cord, though we can't believe that's a question now.