The Telegraph UK on home libraries:

[A]ccording to a new report - The Changing Face of British Homes, compiled by insurers Legal & General - more people would like a library or reading room in their home than either a home cinema, gym or music studio. In the survey of 4,000 people, 15 per cent said they would like a library compared to 13 per cent wanting a gym, 9 per cent a music studio and just 8 per cent a home cinema.

Not mentioned? 40% just want a bigger bathroom.