From the few details we have, the project sounds an awful lot like an HD remake to us – especially given the fancier logo and "Enhanced Edition" subtitle. We've reached out to Beamdog for clarity on what the game actually is, and what platforms it'll end up on (among other things). For now, know that Baldur's Gate: Enhanced Edition will land on whatever those platforms are at some point this summer. We're gonna take a wild guess that it'll be on PC at the very least.
Update: Beamdog reps tell us that the team at Overhaul is adding "new, original content" to the original game to make up the Enhanced Edition. "This is the Enhanced Edition, it's not a repackage. We have the original source code and are doing a significant update." He also confirms that no platforms have been announced just yet.
Update 2: A Beamdog rep also confirms that the company is self-publishing. Though he wouldn't go into detail regarding the new content, he says that "it's being lovingly crafted in the spirit of the original with the help of some of the original developers." Additionally, Cameron Tofer and Trent Oster have been working on the project ("planning and organizing") for "over a year now." We'll also hear more soon, as the team is planning "regular announcements every week with more details."