Earlier this year, a prototype of a dual e-ink and LCD phone was floating around. Turns out it's much further down the development road than that, though—and in fact it should be available next year.
The breakneck pace of awesome Android phones continues: this is a leaked picture of the Verizon Samsung Continuum, an Android phone with two OLED displays. One screen acts as the main display while the second screen acts as the "Ticker".
This modified M50 dual-computing laptop (there's two computers in there sharing a battery) has two displays, one of which is 4.3-inches, and is actually a prototype that will be manufactured later this year.