I'm thinking about upgrading my Sony a300 as I need to do video shooting. A logical upgrade would be the a77 as I can keep all my current accessories. But the 650D looks good as the screen is slightly better in terms of how it tilts plus a touchscreen. Also it has quite good AF for video apparently.
Should I even waitfor something like the 70D to come out which would hopefully inc all the 650D features.
I also have an A77 (bought one 3 months ago)..
The triple articulated screen on the A77 is definitely a step up from the side hinge/swivel (which the cheaper A65 has), it can be used in far more flexible ways, I have started using mine a lot recently, especially holding the camera at a more comfortable waist height and having the LCD articulated to be on top of the camera.. I guess the self portrait is one use case that a side hinge is useful, but really for everything else, triple articulation is more flexible.
The Video AF is much of a muchness, the A77 (and all SLT) has full time phase detect AF (to the same standard as using the camera normally), the Hybrid AF I am sure will also be good and should have it's own strengths/weaknesses, but the AF on the SLT range is still fast and works well with normal lenses.. (And it's 1080p60 to boot).
The EVF is the other biggie, and 90% of the time it's awesome, it's the size of an FF camera, and offers instant feedback on the shot, settings, you can even review instantly in the VF.. As pointed out, there are a couple of issues with not sealing your eye to the cup and having stray sunlight enter the VF, but I just adjusted how I seal the camera to the eye (slightly changed my eye position) and have used it at a few airfields in midday sun with no issues.. And for the rest of the time, it's quite a revelation to me having all the information in the VF.. but some people just don't get on with such things (hence why I'd always recommend trying one out).
Regarding the 70D, that's always a dilema.. there will always be newer stuff coming out periodically, I think the A77 has enough 'other' unique/fun stuff about it (all the Multi-frame stuff/panorama/high fps etc) that it's got plenty to keep it competitive for the immediate future.
But it's all horses for courses, I was hell bent on a Nikon D7000, but just handled and messed around with the A77 in-store and loved the whole EVF/feature list..