The FUJIFILM X-E1 follows in the tradition of the award-winning FUJIFILM X-Pro1 and utilizes the same proprietary 16.3 Megapixel APS-C X-Trans CMOS sensorTM and the same X-Mount for use with FUJINON XF lenses, all in a body that is 30% smaller than the FUJIFILM X-Pro1.
While Phase One has recently updated its software to support Fuji's X-Trans sensor, I'm waiting to see if Adobe follows suit and improves its conversion support in Lightroom.
Fujifilm's advanced X-Trans CMOS sensor is capable of delivering resolution that is superior to other APS-C sensors, and equal to even some full frame sensors found in popular DSLR cameras.
The highly responsive linear motor in the XF18-55mm lens combines with the high-speed signal readout of the X-Trans CMOS sensor and the EXR Processor Pro, to achieve a huge leap in AF speed and precision performance.