Ask HN: When are we getting better batteries?

I've read countless stories over the past decade of amazing strides being taken improve battery performance in the lab. What's slowing these solutions from coming to market? Large-scale manufacturing feasibility? Not enough R&D? Regulations?

Simply put, when should I (average consumer) anticipate being able to purchase a laptop with a battery that goes +2 weeks without charge? ~10 years? never?

Sources:

"Alluminum Batteries" - http://machinedesign.com/news/goodbye-lithium-ion-batteries

"10x Better Lithium Ion Batteries" - http://news.cnet.com/8301-11386_3-57326889-76/same-size-lithium-ion-battery-10-times-the-storage/

"Nuclear Batteries" - http://www.popsci.com/science/article/2009-10/scientists-develop-penny-sized-nuclear-battery

"Bio-Battaries" - http://www.dailytech.com/Researchers+Use+Bacteria+to+Create+BioBatteries/article30218.htm

"Paintable Batteries" - http://news.rice.edu/2012/06/28/rice-researchers-develop-paintable-battery-2/

"Flow Batteries" - http://www.naturalnews.com/041771_battery_breakthrough_membraneless_batteries_energy_storage.html

"Solid State Batteries" - http://www.greencarcongress.com/2009/11/kumar-20091121.html