What's the scoop?
Marriott's 2015 hotel category and tier changes go into effect on March 20th and you can take a look at the changes here here. Even at first glance you can see immediate changes.
The list isn't sorted properly or searchable by city unfortunately, but if you have a particular Marriott property in mind, you can search for it.
The changes are generally not good news for Rewards members, as more than a quarter of all Marriott hotels will cost more points to redeem from March 20th, although some properties are going down in price.