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.
Yes, that road map.
It's not usual for manufacturers to be very detailed on what it's going to be released in 2 years. I don't feel like Sony is to be blamed for being no exception. And a promise of 15 lenses in 2 years is not bad at all. And let me stress again that we're only talking about OEM lenses, not all the lenses that are compatible with the platform.
There are all the adapters that you want. The E mount is not new, only a FF still-camera with that mount is. Sony has had a competitive mirrorless lineup for a while now, and I don't see too many indication that they're going to drop the ball and run away. The same is true for the A-mount.
And anyway, this is not even about Sony. It's about the new tech behind it, or better, the novelty of a camera that offers more than a M9 for 20% of the price. It's about the implication of this sort of product becoming affordable for a larger user base. Fuji is rumored to go FF next year, for example.
Batteries maybe cannot be so much better than Li-ion, but other components can become more energy-efficient. The system will evolve and get on par or superior to current DSLR.
Again, the praise to Sony is not for a lovely incremental upgrade embodied by the recurrent release of a revised product, it's for pioneering a new land previously only belonging to Leica.