There are, but, as we say in Czech: "the paper can tolerate anything". I will certainly be opening a bottle of Malbec the day when the works actually start.
HSRs would be very useful, as the contemporary railway network is badly overloaded and at the edge of its capacity. Every irregularity, including planned repairs, unleashes a hurricane of delays all over the main corridors.
Yes, a new high speed line will be built between Dresden and Prague, mostly in tunnel to replace the current slow and restricted line which had to stay in the river gorge.