Long story short: an awesome new 3D Giana Sisters game, 10x better than what we got on Nintendo DS, to be made available as a digital download on Windows first with later XBLA and PSN releases. Backers of the developer's Kickstarter for Project Giana can get a physical collector's release of the game including all the digital goodies.
A very good looking, playable demo is already available. New moves include "dash" which moves you upward and "twirl" which causes you to float gently across the fields. What's neat is that whenever you switch moves you switch "worlds" from a dream version to a nightmare version. The heavy metal soundtrack is spectacular!