RuneScape 3 will even include the following updates: von smrtsmiths Blog

    HTML5 game client: The next generation of browser technology. It brings a major step up in visual quality with improved lighting, draw distance and colour, loading for your browser RS Gold in moments, without resorting to plug-ins or Java.
    New audio engine: High-fidelity audio and music, featuring full orchestral pieces authored by BAFTA Award winner Buy RS Gold James Hannigan and played through the Slovak Symphony Orchestra.
    Seasonal high scores: Compete against your friends and also the rest from the RuneScape community to rate on weekly and monthly leaderboards.