On the Mindstorms discussion, it's overwhelmingly obvious in the hobby robotics space that LEGO has both priced their way away from their competitors and moved too far away from what they initially offered. The RCX and NXT were small, essentially real-time devices with firmware. The EV3 takes a minute to load up a custom flavor of Linux. In the hobby robotics world, people use Arduino boards to meet one of those needs, and Raspberry Pi computer-on-a-boards for the other. While being able to boot up a server on a LEGO product is awesome in my book, it's probably way beyond the needs and desires of the typical robotics team or amateur wanting to tinker with robotics. This may have been a side effect of how much of LEGO's product offering's can be tied up in robotics kids, but to stay comparable to how newbies approach robotics today, LEGO would have had to make something like the NXT and something like the EV3 available at the same time. Kids these days think nothing of hacking up a project that uses both Arduinos (for handling motors, sensors, and real-time components) and Raspberry Pis (for communication, networking, and ease of use), but someone wanting a similar capability from LEGO will have to mix in a platform that isn't widely available anymore.
...and $30 will cover the cost of either platform (Arduino or Raspberry Pi). Sure, you'll pay more for "shields", "hats", motors, sensors, etc, but most of the time that will add up to less than the cost of an EV3. As it stands now, someone buying a new LEGO robotics set is essentially purchasing the convenience of having things ready out-of-the-box and being able to use it easily with other LEGO parts. Someone who doesn't need LEGO compatibility isn't going to go to LEGO for easy-to-use robotics anymore, even though they would have when the RCX came out. WeDo has only been released in the educational market, and has (so far) been rather limited when not attached to a PC. We are definitely due for a new robotics platform - probably something fairly low end to complement the EV3 (similar to how Spybotics, Cybermaster, the Scout, and the Microscout complemented the more high-powered RCX). Bonus points if they find a way to deliver a passable robotics kit for under $100.
Then again, they don't listen to me, so we could be barking up the wrong tree entirely.
As for the Bionicle G3 rumor - I highly doubt it. Lines don't get cut that suddenly without a good reason. An awesome new platform out of LEGO Futura could do that, but seems unlikely. A new licensed line that Bionicle would directly compete with is more likely - and that category could include arbitrary changes related to the Star Wars figure line.