I'd say that the gaming industry it is getting better overall.
However, as an industry gains in popularity and sales go up, you will get a lot more rubbish being produced along with the great stuff.
Basically, you will have game developers (in exactly the same way you have film-makers and musicians) who make media to appeal to the most people - the masses - to make the most money.
Examples of this are everywhere - one particular painful example of this is film tie-in games. Generally released as an afterthought while a film is being made, there are very few examples of games made for films that actually worked well as games. These games will have sold a lot more than other, better games, however, since the idea appeals to more people.
I would say that with platforms now available like the iPhone/Pad games store, Playstation Network, Xbox live, Steam and other popular on-line stores to purchase games, it is much easier for independent developers to get their games to a wider audience - which can have a lot more time, care and effort put in than a big-studio title. This is good news, and means that gamers have easy access to a whole wealth of games that would before have been obscure and difficult to distribute.
So in opinion, things are changing for the better and we're just going to have to accept that the games industry is going to have some crap in amongst all the gems.