NUH-UH!
no ...don't change the tag...or if you do ...better add M4 (and some serious diehards may want even earlier release sigs)
Perhaps people posting their wallpapers should state the resolutions and devices they are used on currently.
Even make sub-device categories if the desire is to make a kind of database (good idea...since our Nxx0 community has some of the coolest wallpapers around )

Assuming it is just for the n900 will limit alot of cool wallpapers.

For example the ones I posted I have diff rez.'s for my devices and so use the same pics on my n900 and n800 and n810.

If the title were non-inclusively specific... for Sailfish or n900 wallpapers only ...
I probably wouldn't have posted anything at all.