Metro Boston is by far the best tech job market after SV and you still have ocean and mountains (hills). I do not see UT Austin / Rice / TAM as sufficiently elite to draw the critical mass away from SV, but it will continue to grow. Weather will drive most back - I can much more easily handle Boston winter than Texas summer if I had to make a choice.
What saddens me is the inability of SoCal to create a viable alternative to SV with Caltech /USC/UCLA/Harvey Mudd all big time engineering schools. SV grew out of SRI (read Jon Markoff's What the Doormouse Said for the real story - will literally blow your mind) and Stanford's policy of encouraging professors to take sabbaticals to start companies. MIT didn't encourage that and come the PC era the computer industry literally died in Boston overnight and was reborn in SV and Redmond. Hopefully SoCal will continue to develop the local tech economy but without a driver like Stanford it will continue to be the minor leagues.
What saddens me is the inability of SoCal to create a viable alternative to SV with Caltech /USC/UCLA/Harvey Mudd all big time engineering schools. SV grew out of SRI (read Jon Markoff's What the Doormouse Said for the real story - will literally blow your mind) and Stanford's policy of encouraging professors to take sabbaticals to start companies. MIT didn't encourage that and come the PC era the computer industry literally died in Boston overnight and was reborn in SV and Redmond. Hopefully SoCal will continue to develop the local tech economy but without a driver like Stanford it will continue to be the minor leagues.