I'm not surprised to hear they look similar. Like Donald mentioned, Lewis and Tolkien were indeed good friends and discussed ideas with each other while writing their books. The two series were developed about the same time IIRC. Now that Jackson's LotR has set a new benchmark, I would expect any new movies to at least attempt to match it; unless of course they are deliberately being cheesy (Kull, for example).
Hopefully this will give me a reason to think about going to the movies. Hollywood is obviously out of ideas or terrified of anything remotely risky or new right now, so all we are getting is increasingly bad retreads. C'mon, Dukes of Hazzard? Yeah I watched it as a kid, but it was crappy back then too.