I have a 256GB 830 SSD, it doesn't even get warm in normal use - maybe if you did a constant write operation for hours it might possibly warm up....
The main thing I take away from this is not the speed bump, etc., but the fact they are targeting the consumer and pro / enterprise market with a single product range (albeit somewhat significant differences in memory on the Pro devices). Hopefully this can only result in better firmware being available at both business and consumer level, although could also mean many frequent updates in the early days of the product.
As for the evolution of the SSD market, things normally do evolve quickly in the early days of a new technology - its keeping that momentum going that's the hard part, especially when you start getting close to / pushing the limits.
The last big thing in normal HDD storage was probably the move to glass platters, and that become common more than 10 years ago now. But from the start of the 80's onwards (where HDDs really started becoming a mainstream product) the jumps in reducing the size and increasing reliability sort of led to the focus of more capacity which from the early/mid-90s became the main thing to improve - from that point onwards not a lot has changed.
Hopefully the SSD market can replicate that kind of progress in terms of the fact that we now have reliability and performance levels, now its time to maintain those levels and push for capacity.