I'm not a native dev so I can only speculate, but based on my personal experience with Android the past few years, I don't think so simply b/c there's no better alternative yet, performance-wise at least.

On mobile, native still offers better performance and integration than html5/javascript apps, the network latency is more variable and less manageable than with wired broadband, and Android and iOS are tuned more to manage resource usage and even hibernate all but the currently active app if necessary.

And I'm not sure how much flexibility native SDK's provide developers to decide where things like rendering get done anyway. There's definitely some subset of stuff that can be done serverside, hence the existence of Parse and Stackmob, but I don't know the details. There may not be much choice in the matter.