So yeah, when there's not a lot of light around (like…in a computer show floor) they might look gorgeous. They might even still look like that when used on a TV, or desktop replacement laptop (both used pretty much only inside). But when there's really a lot of light around, the only thing left is to crank up the brightness. And that can't go far in battery powered device. Screens that _reflect_ the light OTOH – even bright sunlight won't swamp them; in fact they rely on it to remain crisp and usable.

For truly portable devices – screens that can also reflect light are a much better idea. Check how it is in cellphones: http://www.allaboutsymbian.com/features/item/Su... there is an AMOLED screen there, and it looks really bad compared to transflective screens. PixelQi would work good too…