"It is just Skyrim" - that alone makes it worth buying. Although it's more than just Skyrim as it has many different regions. As for interacting with people, I joined a few parties and had fun talking about the game with them. It certainly can be played solo, but I had fun with groups.
The thing is though it is going to be a lot more expensive than Skyrim. If it were buy to play instead of buy to rent I would probably get it. It is pretty clear that the mmo part was a complete after thought in development. Nothing but a gimmick so they can do a cash grab. If you aren't really into the lore and world of elder scrolls there is no reason to get it.