You can also just shoot 1080i60 with the TM700, and you don't have to do the extra step of dealing with the 1080p60 off the camera. The 1080i60 imports directly into final cut pro (and I assume, but don't know, final cut express also).
The TM700 does have a rolling shutter, but it is very very fast. I have not seen it on any of the footage I have shot so far that is reasonable. I was curious about it, and went looking, and the only place I found it was on a shot out the side of a car going down the freeway at 70mph. You could see very nearby telephone poles and some freeway walls did lean at an angle because of the roll, but it's not the kind of footage you would use, and it was at a speed that most of the things were going by so fast they were basically a blur that showed up for one, maybe two frames. So even if you were using footage like that, it really wouldn't be much of an issue.
It actually is surprisingly good with the other bad place shutter shows up which is with flash photography. I'd say that probably 75% of the flashes I captured were captured by the whole frame. That's one thing that you'll see, even in commercial films shot digitally (I don't know why they sometimes don' bother to fix that, it's not hard!), where only have the frame or like odd chunks of the frame will show a camera flash but not the rest.
Also, important to note that Youtube, Vimeo etc are NOT streaming video. They are progressive download. To a lay person it's just 'streaming' you video online, but it is not a live stream. Chunks or the entire file is basically downloaded and you can pause as it continues to download. This has a significant impact on the type of compression, because you can use and take advantage of variable bitrate compression that you generally would not be using with literal live-stream or webstreaming where it's basically a live feed with minimal buffer and it isn't a progressive download situation where you're basically downloading the entire file and then playing it back using the youtube player or vimeo, whatnot.
Shooting 1080p60 would be mostly advantageous if you wanted to do 1/2 speed or other slow-motion and just wanted more frames there since it's twice 1080i60. Otherwise for web distribution, I frankly don't see the point. 1080p60 is not really a distributable standard at this point. Unless there is a very particular production reason you want to use it, IMO probably not that big a deal. The comparable cameras from sony, the 550, and the canon S21 don't support 1080p60, and IMO I would make a purchase decision based on camera features and capabilities and your needs moreso than 1080p60 unless of course you foresee utilizing 60p for particular reasons.
Also, you should spend some time googling and such, there are dozens of videos and comparisons and such shot with all these cameras available on youtube, vimeo, etc. They, being more compressed web content, are indicative but not fully of the camera's capabilities. Still, there are many very very useful things you can learn about the cameras by watching these various videos. Just beware not to pay too much attention to compression artifacts, which aren't really the cameras fault in that context.