The base technology from ARM can be seen in their Cortex designs. These were disclosed in late 2005, but have yet to appear in actual products. The overall performance is around 3-4 times the performance of the current generation of ARM based devices.
Since Intel sold off their ARM based CPU business to Marvell, it leaves them clear to move their core 32bit x86 platform architecture down into the millicomputing space.
So in the next few years, I expect to see x86 and ARM based system on a chip architectures with overlapping performance and power consumption characteristics in the millicomputing space.