I still use my PE a ton. I have a GNII I use a lot as well. I'm really tempted to get a new Surface Pro 3 or the 12.2" Galaxy Note Tab Pro (damn mouth full). But I dunno. I really love my eDGe and I keep trying other devices for reading and note taking and inevitably going back to the eDGe for anything beyond basic note taking. The PE is the perfect research/study partner for me.
The new Surface Pro 3 + the next Windows 8.x update may help supersede it, tho. They are adding a lot of nice stuff to Win 8 that'll help with the app tiling and what not.
But my PE with 2.2 that is heavily modified will probably still get a lot of use for another few years.
p.s.
My dad has a Note 8 like mentioned above and he absolutely loves it. It is a great device.