The curtain has been pulled back on iPhone 4, and the list of new features is massive: There's multitasking (finally!), a refreshed interface, and literally hundreds of other changes, all coming this summer. Here's the rundown. The new OS will ship in June (Fall for iPad, and a developer preview is available today, so we can expect to have plenty of apps updated and ready for launch.
![iPhone OS 4.0: The Best New Features](https://cdn-ak-scissors.b.st-hatena.com/image/square/1c4ceb14dd6d9eb71ec6887c41f2277f9543be78/height=288;version=1;width=512/https%3A%2F%2Fi.kinja-img.com%2Fimage%2Fupload%2Fc_fill%2Ch_200%2Cq_80%2Cw_200%2F743983ef40322777a7049971bf4faeae.png)