Not just pictures, words too. I wish I had a recording of my mum's funeral, not least because I spent ages writing my eulogy and then lost my copy. Also you'd get the mini-biography and connections, that go into the 'deleted after one listen' part of my brain.
Phones now make surprisingly good voice recordings, so leaving a phone set on the front pew would pick up enough to keep and send to those who missed the service.
I'm a photographer and my instinct is therefore to photograph everything. So far I've not done so at funerals though I often wish I could, especially in fabulous buildings. I was at a Greek Orthodox funeral last year and the inside of the church is spectacular, though from outside it's just another brick slab. It would have been wrong to have taken pics, though I know how to do it so no-one notices.
I have done flowers, and have done pics at the wake when the worst of it is over. People want those pics. Better to take them so you have them, even if you never look at them again. As Shiny says above, they become more precious with age.