If cartridges were reuseable, it would remove the cost of flash entirely. In other words, there could be a standard distribution flash cart size. The cart is only used to transport the game from one physical location to another when the user doesn't have access to broadband and/or doesn't want to use kiosks with their own external media.
So for example a place like Gamestop would carry these reuseable carts already preloaded with a game. When you first buy a game it costs say 60 or 70 USD to offset the price of the flash cart.
After that, each time you go there to get another game, you get a 20-30 USD credit (cost of the cart) which brings the game back inline with the DD cost of 40 USD. Basically once you've put in that initial investment the cost of games going forward would be the same as the DD cost and there is no costs being eaten up by the publishers for disposable media.
Gamestop then erases the game image on the cart and replaces it with whatever new game is coming out. Or keeps it as is if demand for that game is still big. And the cycle repeats.
There are essentially heaps of possibilities. If you consider the distribution costs you could even turn the point of sale into the point of manufacture. Have you even been into a book store where they can print and bind a book on demand? With flash all Gamestop has to carry is a kiosk which is tiny by comparison. That kiosk could potentially just print a logo onto a box and onto a cartridge and spit out a game. So if the game is say the latest Halo release with 90+ reviews etc and you know you'll want to keep it you'll still have your physical media option. Once you remove the cost of distribution, sold stock, damaged/stolen stock the actual real costs will be lower than physical discs because you never print more than you sell. Beyond this publishers can offer a cheaper download option at both the point of sale and online as well as a more expensive physical option since retailers will be able to offer games at the exact same price as online.
Another possibility is rental or buying only the parts of the game you actually want. Say for instance your friends are bugging you to get online with a certain game you could rent it for a few days or even just buy the multiplayer aspect. So if a publisher wants to really push the multiplayer of a title in order to say develop a healthy online community they can offer the multiplayer component only to people with say a cost of entry of $30 rather than $60. With discs this isn't quite as practical however with a cartridge it'd be easy to accomplish. That way publishers can price discriminate between buyers day one rather than relying on future price cuts. They can also change the price of the physical game to reflect any discounts applied to the online versions as well.
If you take the Xbox 360 model, you could use the consoles HDD as the actual reuseable cartridge. So long as replacing it is cheap enough the users of the system will know that if they lose it or break it they can replace every game in their library as soon as they get a new hard-drive. Infact it could even go as far as to save everything including saves and media files so there would be no risk to the end user in doing that. Im quite surprised Microsoft hasn't done some form of kiosk distribution in the 2nd world countries like Brazil where they can offer a cheap(er) local price. These kiosks could be placed practically anywhere especially in countries which are intelligent like New Zealand where noone uses folding money anymore.
Boycott,
SB
Boycott indeed.