I'm pretty sure that cameraphones and smartphone should be the same. There might have been a useful distinction in 2004 but I don't think there is in 2014.
I guess I have a slight preference for cameraphones, but I don't really care which is the master.
TL;DR: merge smartphone into cameraphones. Let apps do the work for phone camera app software.
2 1/2 years on, the smartphone and cameraphones tags are a mess. For the most part, there doesn't seem to be much distinction to the use of the tags.
There are 49 questions tagged smartphone, 58 tagged cameraphones, and 9 questions tagged with both.
Several questions use the word "smartphone", but are only tagged with cameraphones.
Many questions use terms such as "mobile phone camera", "cellphone camera", or just "phone camera". They are tagged either way, with little distinction.
On a pedantic note, smartphone tag is singular, but cameraphones is plural. The inconsistency irks me.
Camera tags that are technically adjectives but used as nouns tend to be singular: dslr, rangefinder, mirrorless
Tags that are actual nouns tend to be plural: compact-cameras, old-cameras, pinhole-cameras
I'd like it if there were a distinction between the two which reflects the documentation we currently have: cameraphones is about phones with cameras in, while smartphone is more about apps. However, I suspect we're not going to have much luck enforcing that distinction unless "we" (the more active users of the site) re-tag questions as appropriate. That doesn't mean we shouldn't attempt to do it of course.
I'd like smartphone more, since it describes the device better, but cameraphone has the word camera innit. PhotoSE is about cameras, more or less. Then again, there's a camera in just about any mobile phone, but a good deal of photo-applications can only run on smartphones.
I get a feeling, even in 2014, that the next week, if a cameraphone tag gets merged into smartphone, there will come someone complaining over it, saying s/he wanted to ask about the camera of a mobile phone but it ain't no smartphone.
For voting, this answer is in favor of keeping them as they are.
Since Esa provided a "don't do it", answer, this is the contrary: we should merge these tags.
