The forum won't change, except for maybe needing a new facelift to match the new how-to guide part of ROJ. The new site will still work with a real computer. All the information will still be there. Mainly the menu system will change for the how to guides. Everything will just look more minimalistic and inline to comply with the new standards for a phones narrow screen. The word they use for the new standard is "responsive", which means it will fit on a wide computer screen or a phone or tablet. There will be lots of space that seems to be wasted on a computer screen but when viewed on a phone or a tablet the text and images will wrap so everything fits the screen correctly.
If I had my druthers I would leave everything as is but you either have to keep up with the times or be left behind. Besides, I have nothing better to do this winter than screw up a good thing we currently have. It will all work out and I might learn something along the way 🙂