Yes. Bethesda has said they're not finished with the series. There will be another game eventually.
Fallout 3 stopped Bethesda from working on TESV for about two years. A lot of people don't like that fact, but I love FO3 so I'm fine with it. But because of that extra wait time people think they're done with TES now. They started working on a new game when Fallout 3 came out, and it's probably TESV. I know it's hard to ask ES fans to be more patient than they already have been, but we just have to wait.