I'm preparing for the next device in the best way I can.

I'm writing liqbase to run as well as possible on current hardware.
All the optimizations and tweaks put in now to my app will make it work simply better on the next device.
turning it around to something like GTK (which more people know) if you can optimize and improve the experience here (yes, I know its hard) it will directly relate to an even more improved experience on the next device.

the double bonus here is that people on existing devices get to use your applications as well as they can possibly do, but then on the new device the experience is even better.

A highly optimized application benefits more than just speed, you gain battery life as well.

just bear that in mind