How to get list of to-be-upgraded packages using apt-get?

I don't use Ubuntu regularly but how about this:

$ apt-get -s --no-download dist-upgrade -V | grep '=>' | awk '{print$1}'

It prints one package per line. As described in man apt-get:

   -V, --verbose-versions
       Show full versions for upgraded and installed packages. Configuration Item: APT::Get::Show-Versions.