Unfortunetly the Kindle DX Graphite has only 128 MByte RAM (instead of 256 MByte for the K3) so some of the improvements will be difficult to transfer.
I'm really looking forward for the WLAN option for the Kindle DX Gr. but I hadn't got the nerves to wait.
And as far as I know the improvements are only relevant for this 'social media crap' which productive people don't use anyway.
Anyway still a pretty nifty device for PDF reading.
PS: I'm really annoyed by the 'weepy attitude'. Improvements will come sooner or later to the Kindle DX Graphite. The K3 is just the mainstream product from Amazon - no wonder they are concentrating on it right now.
Apple kicks you in the nuts if you have a device older than a few years (e.g. no more updates for the old iPhones) and you pay extra for every small (hardware) upgrade. So I'm pretty happy by Amazon's customer support.