Well a lot of the Alpha engineers ended up working on and helped design AMD's AMD64 extensions and hypertransport bus, after AMD adopted the Alpha's EV6 bus for the Athlon you could say Alpha technology and engineers had a huge effect on why AMD bested Intel for quite awhile back in the day.

If it wasn't for the Digital and AMD engineers we'd all be suffering with IA-64 etc... I think it's more likely PPC would have remained a force to be reckoned with in the Desktop space.