I also thought that I am emotionally attached to pbooks. Cannot read from big LCD screens, dispise small screens as well... until I got Sony Reader PRS-500(505 has far superior screen!). I bought it only for holidays time, so i don't have to take a couple of hardback editions with me.
In one month time I forgot my emotional attachment completely. It doesn't exist anymore.
Although, I do love some pbooks, like special editions of LotR or a huge Sherloke Holmse edition