Continued performance enhancements and power reduction are likely but continued device shrinkage is not possible through "transistor alternatives". No other devices have come remotely close to the size of a leading edge silicon transistor. And by the time the "alternatives" catch up with the sizes of silicon devices, the Moore's law would have ended long time ago.
In the U.S., these six were called "supplemental"--a follow on to 24 earlier grants. In Europe and Asia there are similar ongoing nanoscale and quantum research efforts aimed at making the atomic scale work for us, instead of against us.