I don't think right now, xbox and PS4 are neck to neck. (only from this presentation and not whatever came out after)
PS4 we kinda know it's capabilities, their future plan, the GPU specs with the benchmarks they run at their show, tech demos, how the cloud its gonna play its role, even the share button where many are not liking it at least we saw live upload to their fb page. We saw the functionality of the console even though we didn't see the box (But realy what the hell where they thinking?)
Xbox on the other hand, we saw it can Alt-Tab quickly, watch TV, movie but we where only told we can play games on it. We know nothing more than what it looks like. We saw functionality only on dash board lvl.
So right now PS4 has an advantage.
As pricing goes, I'm a little bit skeptical.
As boxes both machines have more or less the same specs, with PS4 better RAM and correct me if I'm wrong slightly better GPU. Xbox comes with kinect. So does the cost on GDDR5 vs DDR3 and kinect even out? I don't know but I predict that they might have similar prices.
(When i use the word better I don't want to start witch one is superior or whatever, just production cost)
19 more day and all our questions will be answered. I cannot wait.