I see Dominions and similar games as hobby gaming.

Interesting observation and i agree. Dominions really is a lot like a tabletop strategy games. Hobby game is a good nomer for those kinds of games. There are a few others that have been on my HD for ages. (MOO3 being an example. I don't agree with the people who say it's bad, though i admit it's very bug-ridden, what most people percieve as bugs, aren't really)
Though i don't agree with the assessment that other videogames have better or more updates. If i look at the few mainstream games i bought, they get at best half a year support, and that's mostly for technical issues. Games like Starcraft/Warcraft where there are balancing patches are the exception not the rule, and in other games not even all technical/gamebreaking bugs get fixed before support is discontinued.