I would love to use these devices more but see several problems

i) Information security is a big thing in my organisation My IT mgr has banned anyone connecting to our network with these devices, basically because he doesn't know how to secure them.

ii) There is a work-life balance issue as has been suggested. Passing the time on the commute home by doing some extra work is fine, but I don't want to be tempted to log on in the evening and check jobs have run etc when I should be spending time with my wife.

iii) There is a totally bogus "these things are insecure and basically leisure devices" attitude from old-school IT managers. Forward thinking IT depts will adopt them, the others will wait until everyone in the world has them and then think about it.