I wrote a bit on my Psyberspace blog after I did the last three sketches. Here is a quote:

Tools evolve, and the best use of any given tool is of value. I have done a lot of sketching on my Palm PDAs – tool I’ll never use again – but therein lies something of value. The lead pencil has no colour. But look what has been done over the centuries with the humble pencil, and it lives. The current – no pressure iPad will die and be gone, but I look forward to making use of it, while it is in its first iteration. What can the finger do on that thing?

Here are some examples, some good stuff there.