1. Instant Messaging Apps work for photos and contacts, but it's stupid that you need to transfer things via cloud (makes everything hellish slow when the network isn't fast)
2. Airdrop works only between Apple Devices, and when the stars are aligned just right. Other devices might appear, or they might not. If it works, it's fast.
3. USB drives are still the easiest way to share anything between computers. (SMB / AFS / NFS / SCP / rsync are all annoying to set up and always seem to fail for hard to debug reasons)
I think the opportunity for something like Bump is still there, but it seems that most people just don't care enough about the inconvenience....