Got a raging one for Steam? Steam is hardly original, except maybe on Windows.
No real App Store? Are you aware that you can buy proprietary software, music, etc. in the Software Center on Ubuntu, Mint and Suse right now? Sure, it's not universal across all distros, but Fedora and Debian reject proprietary offerings on principle (and still have tens of thousands of non-proprietary programs in their sofware managers) and the rest are irrelevant in terms of market share, so Steam for Linux follows the same distribution curve.
Steam has friend lists and achievement notifications, but that's not exactly needed for an application store... while both APT and RPM are technically vastly superior (Steam doesn't even support delta updates, version hold-ups, downgrades or concurrent dependency resolution) and have been around quite a bit longer.
However, I'm pretty confident it'll find a niche because of the built-in social networking, where it has to compete with Desura. But it doesn't "standardise Linux for developers" except in the packaging (which is somewhat around 1% of a porting effort), doesn't offer "stable binary APIs" (that'd be drivers, kernel and middleware/engines) and can't hope to improve on the present library version management.
That said, yeah, it's nice to have one more option!
Sorry if I've damped your enthusiasm, no offense meant, but your comment struck me as starry-eyed ;)