Sapphire is the second hardest material after diamond. It's not surprising then that it's toughness, while being higher than that of diamond, is not very high compared to other materials. That's the problem.
That laptop... Why put the trackpad on the left? It doesn't make sense.
About the spreadsheets. Numbers can't be used for spreadsheets just a thousand entries long. It's too slow to load.
Minutes vs seconds for Excel.
And it becomes unusable really quickly when adding lots of data. No company will use it until it can compete with Excel.
One of the best parts was :
"A stylus! We are going to use a stylus, right?.. No."
Others could have thought of the touchscreen. Jobs realized that they couldn't use a stylus. It would have made the iPhone a little like many other phones. Multitouch is truly the one thing that made it successful, if we oversimplify everything to a minimum.