Don't get too excited, because they're just proposed rules, but these changes would cut a lot of restrictions from flight training.
The biggest is probably the ability to maintain instrument currency using a sim without an instructor present. There's been a lot of frustration that you can stay IFR current by flying approaches in an airplane or in a sim, but you have to be accompanied by an instructor if you're doing it in the sim. Whether this makes sense depends a lot on the instructor you're working with. If the instructor is sitting next to you reading the paper while you fly, it's legal, but not productive. If the instructor is selecting unpredictable weather and playing the role of ATC, that's a totally different experience.
Another proposal is to remove the complex aircraft requirement for the commercial rating. Bad news for owners of the Piper Arrow and Cessna 172RG, which don't really make a lot of sense for anything other than commercial training. The proposal is to allow commercial training to be done in a "technically advanced aircraft," which is essentially any glass cockpit aircraft like a Cessna 172 G1000.
I'm actually not a fan of these rules. I think they roll back some useful training requirements, but form your own opinion, and we'll see what actually goes through. I'll keep you up to date. If you want to see the actual NPRM click here.