If at LCY...should you travel by sea or by air?

The Olympics are about to start! and people are flocking to London by land, sea and air...

Here is a picture that my friend Tanja sent me from London City airport, it is not that often that you get to see boats and planes side by side, but this is what is happening now in East London, where large cruise ships are berthed on the Thames, right next to LCY.