Funny set of points to make, but yes: there's great potential. Games industry in and around Dundee, centered on graduates of Abertay. Rockstar North. Quite a few other big names about: Oracle, Cadence, Microsoft. Quite a lot of tech in financial services. I nearly went to work for a satellite company in Glasgow called "Clydespace".

A startup scene is not yet so visible. I'd be interested to hear where it is in Edinburgh.

If there is a spate of businesses pulling back over the border (which I highly doubt), that would just open up gaps in the market for local entrants to fill.