Anyone know if these will still be compatible?

I would say so, take a look at the link to the site. They list them as Phantom 3/4
https://www.polarprofilters.com/products/dji-phantom-3-filter

From what I understand all Phantom 3 pro/adv filters will work on Phantom 4

NJFLYGUY Posted at 2016-3-7 21:55
From what I understand all Phantom 3 pro/adv filters will work on Phantom 4

Ah thanks. Hadn't bothered to check the selling sites to see if they updated listings.

rwjorgensen Posted at 2016-3-7 22:22
Ah thanks. Hadn't bothered to check the selling sites to see if they updated listings.

No problem

Correct!  those filters will work on Phantom 4