I've finally reached this point too. I managed to get all of my 7"s and 10" on Discogs over the last couple of days, but am now dreading the LPs.
I have moved house ten times in the last eight years and have another (temporary!) move to make in just over a month. I realised that in all of this time, probably 90% of my records I haven't listened to more than once or twice. I think since I started buying records as a teen I have changed (I spend less time alone in my room) and technology has changed (mp3s ain't so bad). As someone else commented though, ironically the process of going through and listing them does make you fall in love with your collection again, listening to stuff you forgot existed, noticing new details in the artwork, looking at the pressing variations etc.
I don't know what I'm going to put in the middle of my living room any more.