Are we complaining that there is too much? I'll rather have 1GB+ RAM and less battery life anyday of the week. From 512MB to 1GB, you would be talking about near negligeable increase in battery usage anyways. Biggest battery user isn't RAM by any means. It would probably use more battery if it needs to access the slower flash as a swap and do things slower coz of it. You can easily replace a battery when it goes flat anyways. You can't with RAM.

With my N900, I constantly feel the need for more RAM (and CPU) even during multitasking few MicroB's while playing music/videos etc for example. Give us more hardware and considering the nature of the OS and the people who use it, I'm SURE we'll be making full use of the extra RAM.