http://www.coingecko.com/
Someone at least put a decent amount of effort into it. It didn't strike me as being complete wrong or anything.
It's a good start. It doesn't track innovation but it tracks activity. Now if we can just figure out how to track innovation.
Like for example the concept of the DAC, snapshots, Delegated Proof of Stake, came from the Bitshares community. The Blackcoin made Proof of Stake mineable for the first time, and they are developing Black Halo. The NXT came up with transparent forging and many other cool technologies. The Mastercoin community came up with the meta coin and launched via an exodus address. Ethereum will be turing complete and modular. The Dogecoin community started giving to charity to get attention and did the NASCAR and Olympic thing.
So you can at least track the number of new inventions per blockchain or per community over say a year. Part of the reason most of us were attracted to Bitshares was the fact that Bytemaster and the team were constantly innovating. This is a double edged sword at times because sometimes innovation sets the launch back while others steal the innovations and launch first.
But to have lasting power as a community innovation has to either come from this community or this community will have to borrow innovations from other communities. It's not always easy to borrow innovations from other communities and that is why many clones fail. They think that if they just have the same technical capability without the same people behind it or the same team that they'll be able to keep up just by forking.
The truth is you have to actually keep innovating at the same pace and even increase the pace over time. I think the Bitshares community is still okay but right now NXT is in the lead on innovation. Mastercoin which started all of this has taken a turn for the worst as now they are developing slow and no major innovations have come from the Mastercoin team so far this year. Bitcoin barely innovates at all in the core development but there are so many businesses around Bitcoin who innovate that they can afford to be conservative.
I think Litecoin is going to lose a lot. They haven't innovated much at all and NXT is probably going to take them over. Ethereum has a lot of hype but hasn't launched and Bitshares will launch soon, has a lot of great ideas on paper, but until it's actually implemented we wont know.