Well, the tweet says it all.

Of course what it means exactly is unclear, but with the recent ruling on DRM and 'jailbreaking', there's no reason to think that XDA members won't be able to unlock our devices at some point and support 'sideloading'. Just like we suggested.

w00t

footnote: While XDA Market is the product of XDA-developers member davidgiga, it isn't an official XDA-developers product.