This really is a good question.
When teaching something like Vietnam, the large opposition to the war is always included, but with an older event like WWI, it is often forgotten. However, I don't think Bush will rank with Lincoln, Rooselt or Washington, simply because they were significantly more popular in their own day than Bush is. Then again, give what I said before, who knows?
Anyhow, I've never completely excluded the possibilty that Bush may be setting the course for a bright future, but I tend to favor the evidence against it. Given Russia's nuclear programs, paired with the agreements between Iran and Syria (and possibly Shi'a Iraq and Lebanon a little down the road) seems like we might be thrown into another Cold War a soon.