When it comes to design, there is no right or wrong because design is all about preference and about a never-ending cycle of iteration. These awesome lockscreen concepts by Jordi Verdu make me wish the iOS 7 and Android lockscreens looked just like it.
You have basically everything you need (except the signal bars) right there, without having to unlock the device. The weather, time, date and most used apps giving you little coloured dots as notifications.
Jordi didn't just stop there though, he also made animations for his concepts, showing how the whole thing would work. It's all very well put together. I especially like how the background fades back and the clock/date fade in - it's gorgeous.