Carrying a Backpack to Work- Yay or Nay?

It is a daily struggle for me to carry all of my junk to and from work.  I always have at least 2 bags (computer bag + purse) plus gym stuff and sometimes lunch.  Not only is it a lot to carry but it's hard to keep it all on my shoulders when I'm wearing a jacket or coat.  I'm constantly fidgeting and dropping things, so I have tried a lot of bag options.  Most recently I've been using this awesome LuLuLemon combo gym/computer bag that my mom gave me - it's great because I can put gym stuff and my computer in it, but its a bit cumbersome to carry. Plus, if I have a coffee+bag+purse,  I don't have any free hands. This challenge has me considering a backpack.    I've seen some fancy ladies carrying backpacks (photos below via CarolinesMode)  but I'm not sure I can pull it off.

Would I just look silly carrying a backpack to and from work?  There are some cuter options these days.  Maybe something with a leather accent? 

I think the biggest difference between me and the ladies above is that my backpack would actually be full of stuff. (not empty and hanging off one shoulder)

Here are some of the cute ones I've found:

Striped Fleece Backpack  - Parketo! ($58)

 "Backpack to the Future " - ModCloth ($79.99)

Classic looking O'Hanlon Mills Colorblock Backpack - Urban Outfitters (Just $28)

Canvas Stripe Rucksack - Asos ($62.76) What do you think?  Should backpacks be reserved for students and hiking?

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P.S. I found this Color Collective image on my hunt for real women wearing backpacks. Next time I go hiking, I want it to be something like this: