After introducing Sony Xperia S, This time Sony announce Xperia P and Xperia U, this two new Xperia™ NXT Series from Sony still use the same Dual Core 1 Ghz processor just like the Xperia S but with smaller screen size and camera resolution.
Comparison between these Xperia™ NXT Series.
Xperia S > Screen size (4.3″), Camera resolution (12.1 MP)
Xperia P > Screen size (4″), Camera resolution (8 MP)
Xperia U > Screen size (3.5″), Camera resolution (5 MP)
These three Xperia™ will be release on the second quarter of 2012.