A Efficiently produced and operating photovoltaics.
B Engineered / integrated photosynthesis technology (create H2 + O2 from water based on sunlight at 99% efficiency).
C Efficiently produced / operating hydrogen fuel cells.
D More ubiquitous communications / IT access; eliminating the digital divide, giving access to the 3rd world.
E Localized home / village scale independent power generation, food production, et. al.
F Anti-aging biotechnologies (pandora's box, but I'd not be surprised if it is already known or will be within 10 years)
G Physical regeneration biotechnologies.
H Eugenics (major pandora's box; no major "upsides" intrinsically if one has F/G et.al., but a lot of apocalyptic downsides)
I Oceanic habitation.
J Natural capitalism / permacultural engineering of our societies.
K Better educational systems, especially ones taking advantage of IT and digital libraries and interactive AI "teachers"
L Efficient, cheap, high power capability, high temperature superconductors.
M Better more efficient propulsion technologies for land / air / space.
N "Imagine all the people living for today....." social paradigm shifts.
O Automated manufacturing technologies that can input specifications and output anything.
P Massive recycling (goes with J).
Q Eschewing greed, exploitation, class / racial / gender 'caste' systems.
R Ending fossil fuel use obviously (A,B,C,E,J)
S Possible orbital / lunar industrial development.
T quantum computing.
U Artificial intelligence (that's going to happen VERY soon if not arguably already done / doable)
V Artificial life (pandora's box again)
W Peace, non-violence, compassion, enlightenment, social evolution, memes of cooperation instead of competition.
...lots of derivative bits.