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After playing around in the PvP worlds a bit, I found out some side uses for it for those who actually care:
1) Good for prayer training - lots of people leave the bones from their kills on the ground which you can run around and get for yourself.
2) Good food drops - most of the drops are food like lobster and cake (at least for me), which is good for those that are too lazy to get their cooking levels up
3) Good for rangers - if there's a player using a bow in the area, you're sure to find lots of arrows lying around which you can pick up. I've found a good number of adamant arrows, which are fairly expensive as far as arrows go.
4) Good for money - although the money income isn't near as good as the old wilderness, you can still make a fair amount of money selling the items mentioned earlier (ie: bones, food, and expensive arrows). You can also find drops such as mithril armor, which go for a good sum at the GE.
The above are just some things I thought I'd share. I know the new PvP updates aren't even close to what the wilderness was, you gotta make do with what ya' got.
I lost all my dignity a long time ago.