That seems a much faster focus to shot time which would be great, able to capture children moving and trains at speed would make it a great light weight alternative.
Now sony vs canon, are sony better? No I don't think so, they just do things in a different way.
pros for sony
high iso capbility
dynamic range
focus, af is faster and has tracking
70-200 f4 lens available
os, if they bring the 5 axis down to say the a7000 range, that would be great
cons
16-50 lens isn't that brilliant
it's a system change
can't think of anything else really
Then of course there is olympus with the rather nice em5 mk2
not as good high iso performance,( i hope to compare these at the photography show) but a cracking range of lenses available including f2.8 zooms, the 40-150 is just amazing. Plus there's a 1.4x tc
The only other main alternative I see is samsung, which has what appears to be an excellent sensor in there nx1 flag ship and is also in the nx500.
So yes there are better offers out there, I am sure if canon wanted to bring an a6000 series competitor they would do a damn good job of it.
Do I want to go buy an a6000? No, it just doesn't excite me and appeal to me, maybe the next iteration will, but who knows!
Latest cameras that have appealed are the gh4 from panasonic, the em5 mk 2 and the samsung nx1, all of those options would need me to sell everything I use now. Not done it because I value my 50-500 too much and I don't want to lose it, it's too useful.