Ok maybe its just me, but I don't really have a problem finding my mouse. Not sure exactly who this "feature" is aimed at.
It's useful if you're using big monitors and/or dual/triple monitor setups.
On my Air, it's not a big problem but on my 27" iMac, I lost the cursor dozens of time every day. When I had multiple monitors, yea, I lose it all the time.
It is even worse when you're in the dark environment with dark wallpaper with a dark cursor.