I always used to play the 'cool and better' card when showing off RISC OS to other people, but it's pretty impossible to do that now. OK, we've got great font rendering, but then other OSs have comparable solutions now, and the stoney textures aren't as impressive as they were back in 95. Quick bootup, quiet operation and drag'n'drop are still things to rave about though.
To take an Apple approach now would need considerably better hardware which was capable of running XGL or similar 3D desktop, proper multimedia support & web browsing, decent video editing and image editing software, interesting cases, lots of marketing money... etc etc.
If the web browsing and media player issue is sorted, at least then you could aim at general entry level users who want just that - the net, DVDs and some WP.