They're speeding up the syncing speed ON TOP of the lightweight wallet they're gonna release. (Meaning the faster syncing speed is not because of the lightweight wallet but the actual core wallet). This is groundbreaking!
Correct. This way our users can see and utilize their Pandacoins right after installation, and very quickly be able to participate in earning interest AND help secure the Pandacoin network to prevent 51% attacks!
All without relying on relying on a liteweight client. Any proof of stake based cryptocurrencies that survive in the long run will inevitably have gigabytes upon gigabytes of blockchain data to download, similar to Bitcoin today. There will inevitably be a large chunk of new users that will want to opt for a liteweight wallet just because they want to be able to use their coins ASAP.
However, this would mean they can't earn interest nor help secure the network.
So we basicly get a full wallet with the speed of a lite wallet, that's nice (+ the lite wallet of course). But I'd be interested in knowing that is it technically possible to make a lite wallet that earns interest and helps secure the network? As like you said, at some point we will have big blockchains taking gigabytes of space and it would be nice to be able to stake without the need to download all that (even if it's done really fast).