I have no idea. My computer has no problem runningthe "real" Dungeons & Dragons Online, which is free btw, the download is a killer though. MS Flight Simulator runs like molasses on my low-end laptop but DDO runs just fine. hhhmmmm.
I tried DDO and almost gave myself whiplash trying to stay awake playing it. As bare bones as it was Guild Wars had much better graphics and game play IMHO.
However, I've read industry reports that say these low-end browser games may seriously hurt high-end gaming because casual gamers are flocking to them and ignoring console and PC game sales. Without the casual gamer to fill in the budget gaps the hardcore gamers will be in a pinch.
The casual gamer likes them because they can click a link and then go finish filing their reports or running their spreadsheets or whatever while the game's timer counts down.
However BBG's are in their infancy. The click and forget format is a winning concept but so are concepts such as the RPG.
If some decision making can be incorporated into a BBRPG it'll blow the ****ing doors off of WoW or anything else. People like farmville et al because they have a modicum of input. Imagine mafia wars where you could decide on tactics in addition to just collecting a load of crap over time for your mission. Why do I need a mini-gun? Maybe I want a molotov cocktail? A tommy-gun tactic might reduce a rivals number of henchmen which in turn cripples his firepower but a molotov destroys a targeted business thereby reducing revenue.