first of all, everyone here is underestimating how hard/time consuming it is to convert osrs protocol formats to higher revisions
for example, a lot of data is not available in osrs which means it requires generating new data such as HD water data/atmospheres
speaking of data, a lot of osrs data is either invalid or not correctly supported by 503+ data which also need correction before even being able to be converted (e.g. animations)
and to the guy who claims textures are easily done, they're not (unless ur going to do it in a dumb way which gives problems anyway).
and those who want to manually convert cs2 are better off not bothering anything related to osrs at all
here is inferno, looks easily done but trust me it isnt
now to answer ur question @OP, i dont see a 'full potential' as ur overestimating the amount of content that was released during the existence of osrs
raids (1 & 2) and the new bosses are cool but that's about it. how about making existing 503+ content work properly first? minigames like stealing creation / castle wars are extremely fun but i have yet to see servers that actually add in perfect functionality