In the grand scheme of things, it's not a major revelation, but this is great news for end users because you won't be locked in to Sony's products. Trusted Reviews lists the long line of the Memory Stick line and it included Memory Stick, Memory Stick Select, Memory Stick PRO, Memory Stick Duo, Memory Stick Pro Duo, Memory Stick PRO-HG Duo and Memory Stick Micro. Sure, there's miniSD and microSD, but it's nowhere near as convoluted as Sony's mess.
This is just the latest sign that we're going to see some more standardization in the mobile phone industry, as the CTIA recently endorsed a universal charger standard based on microUSB. Standardizing charging points and accessories seem like a no-brainer to me because it cuts down on manufacturing costs, and it can lead to a better end-user experience.