Considering that the trend with Anime is that the Anime eventually gets at least 1 movie release during the run. Hell, Inuyasha has what... 3/4 movies? Bleach has 2 I think, Pokemon has like... what? 14? xxxHolicxxx and Tsukasa each have one. Love Hina got two.
The culture is the big difference. In Japan I think it's more common for the Anime to get feature films and do fairly well. It'd be like the Spongebob Squarepants Movie in the states, and then they started making more. Feature films based off of cartoons don't do as well in western countries because cartoons are viewed more as "for children" rather than across all age ranges.