The problem is that these App games are a de-evolution of gaming rather than an evolution of it. Saying that because these are no worse than games from the 8 bit or 16 bit era and thus should be considered worthy games, neglects the evolution of gaming since that point. What's more the fact that games of this sort can make money off of the casual market hurts the gaming industry by causing game developers to neglect real, serious, evolved gaming experiences in favor of the quick cash grabs. Granted there ARE exceptions to this rule like the aforementioned "Infinity Blade", and perhaps some of those simple games are pretty good, but how many of those apps are utter and complete crap? How much garbage has been produced because of those few games that can be defended?
Basically these games are the equivilent of the cut-rate software at a Best Buy or Wal-Mart going by names like "Alien Disco Safari" or something totally deritivive. The problem is that we're seeing a market of undemanding casual gamers who will consume garbage like this and aren't being cultivated to want more, and a situation developing where this is rapidly getting to the point where this is all that game developers are going to want to produce.
Right now we're looking at an era where we have game developers saying they couldn't create the equivilent of games like "Final Fantasy VII" today because it wouldn't be cost effective with the current technology (or more correctly what people on the development side having decided they should be paid for their work). Things like app games contribute to this because if someone can make more money by producing fifty app games than one really big game for a similar investment, that is what they are going to do.
Ideally gamers of all sorts should be able to co-exist. The problem is that the arguement that the casuals, and "app gamers" aren't hurting anyone carries increasingly less weight. Few, if any, developers are creating the huge game experiences that serious gamers demand, and those few that do appear are not enough to fill the demand. Even companies like "Bioware" are moving towards flashy shooters (their have interactive cinematics as their selling point), shooters being a form of casual gaming especially nowadays (Farmville for a differant audience). As things go on we're largely seeing a situation where most of the big plans are for shooters, sports games, social networking games, and bite-sized apps, because that is where the money is. There really isn't much in the way of massive budget, deeply statistical, turn-based RPGs for that crowd (and whether you like it or not, it is a substantial crowd) under development... not because such games won't make money, but because they won't make ENOUGH money compared to churning out garbage that is also easier to produce.
As far as Steve Jobs goes, I think the issue isn't so much that he isn't game related, but rather than the coverage of him and his influance on current gaming isn't negative, and it should be a lot more negative than it is. Largely because a lot of these guys on the internet are proably being paid by Apple to do reviews and such and promote those same apps and the platforms that support them that are an industry wide blight. Some blogger can either be honest in criticizing Jobs and the platforms he helped promote, or he can make money from Apple... the choice most make is painfully obvious, with people who love games but come into positions of influance and deciding to be more pragmatic and self interested than maintaining an attitude that is good for the games themselves, no matter what their initial intent was. Some, like the guys at "Penny Arcade" even seem to convince themselves that they haven't changed or sold out.
That said, saying that Steve had an influance on gaming outside of this is wrong. After all anyone who grew up playing games on the old "Apple II" probably knows better. As far as hardcore gaming goes, that's the platform that had overlooked cult classics like "Deathlord".