The other thing to consider is wear on cameras.

DSLRs do wear out, and the "spray and pray" crowd will need a new camera long before those of us reared on film.

I don't see a market for a new 35mm SLR just yet as there are so many perfectly usable ones on ebay for next to nothing here. I've paid 99p for a Pentax P30 body in perfect working order before now, stuffed a roll of film in the back and a 5 50mm f2 on the front (cheap as I had to clean a load of fungus out, but it's perfect now) and had something which could match a few thousand pounds worth of pro DSLR for less than a couple of rounds of drinks in most pubs.