Seek for the Sword that was broken:
In Imladris it dwells;
There shall be counsels taken
Stronger than Morgul-spells.
There shall be shown a token
That Doom is near at hand,
For Isildur's Bane shall waken,
And the Halfling forth shall stand.
Wouldn't it have been neat to be in the room when they were writing the script, and debating what to put it, and what to leave out. What to move to a different place, and what to make up from scratch. There have to be reasons they felt the existing writing wouldn't work the way it was, or why would they go to the trouble of rewriting? I would never have made a good fly on the wall though... I would have had to speak up.
"Boromir's stuff" is important to those movie goers who haven't read the book - to emphazize why Gandalf fears the Ring (and just in case they thought G was a wimp!) People new to the story are asking the same question...why can't the good guys use the ring.