Android 4.2 has multiple-user logins
I think Android 4.2 is taking on iOS heads on. If you own an iPad with all custom settings; you can't easily share it with another user; because there's no way you can let them create a separate login or say offer 'guest' access. Android 4.2 solves that problem by allow multiple user logins through the interface with custom settings.
I think Google wants to bring the best of desktop computers and laptops to the tablets by allowing users to create personalised settings on their tablets. What do you think of this feature? I personally like it.