There is a very real chance that this pandemic will last in excess of a year, and along with the changing economics of various countries the social and entertainment aspects of travel will continue to be among those most highly impacted. Everyone knows that while guidebooks change, the majority of information is easily good for 10 years or so, like the advice on this forum. I see this changing drastically, where guidebooks printed before 2020, and advice from travelers who visited a place prior to that year, will be obsolete within the next year or so. Hotels and restaurants are already closing permanently. So too are smaller museums. Travel services such as rail and airlines are going to have a very hard time remaining in business over the next 12 months as governments are forced to curtail bailouts due to a lack of funds.
There's a very good chance that the "golden age" of travel, affordable to the worlds middle class, will be severely altered. I foresee a point where information currently printed is superseded by that of online access to a much greater extent than we have known.