I used to be a huge fan of browser-based RPG's. The one I played most was called, "Archmage," later reconstructed under the name, "The Reincarnation."
The interesting thing about this game, and its genre, was that there were no fancy graphics. It was based entirely in 1998 browser windows, displaying stats and text with some cool images sprinkled here and there.
I would say that this early genre was the foundation for games like Farmville. In both games, you manage, 'buildings' which grant you income/economy. You use that income to grow your city.
The main difference between Archmage and Farmville, however, is the amount of cooperation and competition involved. Farmville and subsequent games have no challenge. You work with others, and you grow your 'land,' but through an investment of time, not strategy.
Archmage on the other hand allowed users to compete with each other. Strategically, you had to manage your army, and economy correctly, or risk losing units or structures. You focused on gaining "land" to expand your territory, like Farmville, but it could be stolen from you in battle and you too, could expand by attacking others.
The other difference, and the main meat of this topic discussion, is that Archmage doesn't use a 'field' or placement grid for buildings. Your city was represented as a bunch of numbers, with gold regen(+ or -) mana, building count, etc. As is your army. When you attack, you don't do anything manually. You are presented with a report, and wit how much land/gold you gained and how many units died.
Is there a place for games like this still? Games that focus more on strategy and numbers than handholding and graphics?
I suppose the questions comes up, does implementing graphics/2d fields/grid take away from the strategy, or hamper the experience.
To start the discussion off, I would argue that, in a way, it does hamper the experience. If the gameplay requires constant building/rebuilding of structures (which archmage would), it would get annoying to have to manage placement of buildings that might vanish or be destroyed.
You could choose to visually show expansion by managing a dynamic image which changes with player power, but I think thats about as necessary as it would get.
This means that the main question is, would players be able to handle a game with no graphics? I think there is certainly a niche, but could that niche be expanded and grown?