Traction, that's a great deal. It'll come in handy for many things.
As SWITAWI pointed out, I used the 1650 for the kitchen stuff for a while, and it was great. but REALLY heavy. You might think it's not a big deal, but it got old quick. and since I started using the Snow Peak IGT setup, my kitchen Pelican is now much smaller and lighter.
When stacked, they can be used as table or even cutting boards:
I also use it as a giant ice bucket to serve cold drinks in my backyard weekend bbq.
I use the 1650 for the lighter stuff, tent, sleeping pad and sleeping bag. Because I don't have a roof top tent, I have to setup and break down camp everytime I hit a new campsite. And I am able to just shove everything in the Pelican without having to fold everything nicely.
I also use the 1650 for air line travel. I don't like paying the extra overweight fees, but well worth it depending on what you are traveling with. I've used the Pelican to take the IGT BBQ Box to Maui when I found out that the vacation rental condo in Maui didn't have a grill in the backyard.
because my family can't function without beef:
oh, you've stacked rocks while on the trail right? when you need a real big rock, consider using the 1650. Works great.
Camping trips with a large crowd, you can bring your firewood in the 1650. after you burn off the wood, pack it with trash.
These are just some of the uses for a Pelican.