(submitting each idea as its own comment) A centralized content-consumption queue with comparison shopping and price alerts. E.g. back in the days when Netfli

(submitting each idea as its own comment) A centralized content-consumption queue with comparison shopping and price alerts. E.g. back in the days when Netflix was DVD-only and had a decent selection of films, you could add practically anything ever screened to your Netflix queue, where it was captured basically forever. Nine times out of ten the movie I want isn't available on Netflix Watch Instantly, so I have to add it to some todo list somewhere and promptly forget about it. I also usually can't be bothered to see if Amazon or iTunes has it, and certainly can't be bothered to check back every so often to see if it went on sale. The same goes for physical and electronic books, music, and even stuff. I would expect this service to be free (paid for by Amazon/iTunes/etc. kickbacks), or at most cost me some privacy. Advertisers would probably pay top dollar to put their deals in front of users who are already planning to buy their stuff at some point in the future.