Sony has published a road map. 15 lenses in 2 years is really not bad for a whole new system. Has Canon done better with the EOS-M?
Moreover, Samyang has confirmed the release of FE lenses in a couple of months. Not to mention Leica, Voigtländer, Nikon, Canon, etc etc via Metabones adapters that even retain AF. Sigma and Tamron will also express an interest sooner rather than later, to try and conquer this whole new market. If this system lacks something, it's certainly not lenses - not for long.
And no, the A-mount has not been abandoned. Together with the A7/r, Sony has announced a new 70-200/2.8 for A-mount and a new enthusiast camera is scheduled for 2014.
Is there a more detailed one for the outer years? Those unmarked bars are far enough in the future that Sony probably has not committed the big development bucks to it. If the system sells poorly, those plans may never be realized.
A f/2.8 35 prime? A f/1.8 55 prime? A f/4 70-200? A f/4 24-70? A f/4 wide-angle zoom? So far, their planned offerings are slower than their DSLR counterparts. No f/2.8 zooms? Why buy into an expensive system to get the FF sensor and not be able to use fast glass that APS-C cameras can already use natively? And how many Sony adaptors are there? It looks like Sony is trying to hedge their bets (A, FE mount, etc.), and it'll be a mess for a while.
The future may belong to mirrorless, but technology development is not a smooth transition. Early adopters can get burned (minidisc or Sony-proprietary memorsticks, anyone?). I'll wait. And battery technology is a big issue. There really isn't anything better than lithium batteries on the horizon and 300 shots/battery is not going to cut it.