tail-like continuous ls (file list)

tail-like continuous ls (file list)

I am monitoring the new files created in a folder in linux. Every now and
then I issue an "ls -ltr" in it. But I wish there was a program/script
that would automatically print it, and only the latest entries. I did a
short while loop to list it, but it would repeat the entries that were not
new and it would keep my screen rolling up when there were no new files.
I've learned about "watch", which does show what I want and refreshes
every N seconds, but I don't want a ncurses interface, I'm looking for
something like tail:
continuous
shows only the new stuff
prints in my terminal, so I can run it in the background and do other
things and see the output every now and then getting mixed with whatever
I'm doing :D
Summarizing: get the input, compare to a previous input, output only what
is new. Something that do that doesn't sound like such an odd tool, I can
see it being used for other situations also, so I would expect it to
already exist, but I couldn't find anything. Suggestions?