Re: "Tom Cruise" - Hollywoods permier scientology creepozoid
I don't think the major problem is corporatisation of the industry - it is the fact that actors and directors have too much power. In fact, too often they are the same thing, or wearing one of those hats plus being the producer. This is, in my experience, almost always a bad start. A good movie is a team effort, and one person having more than one important role is usually a sign that the team is diluted. Another problem is that, somewhere along the line, film-makers forgot that we need to have some empathy with the characters if the movie is to work and have any lasting impression. No excellent movie has an entire cast of characters you don't actually give a flying toss about. Look at "Pulp Fiction", for instance, when all of the characters are actually really nasty pieces of work, but there is something to engage with, and compare it with, say, "Mission Impossible III".
Of my recent sci-fi viewing, "Moon" was quite good with some reasonable ideas, good acting, and a clear vision from the director; "Dredd" was fair, with excellent camera-work but too lacking in scope and characterisation; "Prometheus" is okay, but doesn't go far enough, and doesn't have a single character to empathise with (compare that with the real "Alien" franchise); and "Robot and Frank", which nearly got it right, though I had more empathy with the robot than any of the humans.