Can I ask what age group you are? I'm really confused that someone would consider carrying 4.5lbs (2kg) an issue, but I am still a long way off from middle age so that may have something to do with it.
I wouldn't call it an issue, but it was so freeing when I got the company VPN client to work on my home machine, and could just leave my laptop at work. When I leave it there, no more backpack, dongles, other junk.
I still carry it most days, though. And I don't think I'd be a whole lot happier to carry this thing. I can't really put it in a pocket; not if I intend on sitting down.
If it's all I needed to carry, it wouldn't be bad, but add it to the weight of rain gear, bike lights, and gym clothes (including shoes) in my bike bag and it's significant.
