Better graphics, etc - Don't care.
Free-form interface - About 2 years too late, should've been implemented way back
Expanding hiscores - ? A list of players is a list of players.. Dunno what more they can add except maybe make it usable instead of the mess it is now.
6th Age - maybe the only interesting bit, but how many people play rs for the "immersion"/story behind it.. I can think of many better games for that lol.
Looks exciting, may have to buy a new graphics card for this.
Highly doubt it, it's HTML 5, not a proper intensive engine.