faster , what they do is reduce seek time and a little faster with access times, but the cheaper SSDs aren't that fast anyway.
yes that's mostly true although a lot of people that previously used laptops can do virtually all what they do on a tablet device.
I used to prefer a compuetr for email, but for replys and quick messges I use the ipad and dictation, it doesn't always get it right but it's on a par with my spelling ;-) I prefer watching video popcasts on the ipad but I find holding it for long persiods 10mins + difficult, so tend not to watch films on it. I find it very handy for checkign bus/train routes and times via the free apps, but I most use it as a camera. The other day I wanted to see what was on top of the warddrobe, rather than get a ladder I took a photo, now that's what technology should used be for saving effort ;-)