Before anyone gets excited about getting a practical quantum computer soon, it should be emphasized that while they're experimentalists, this news is only about a design they have in mind to use with their SiMOS quantum dots. There's a gap between that design and the status quo of their physical quantum gates in their lab.

Their gates (both single and two qubit gates) are slow and their fidelities currently are below the threshold required for surface codes. There're also big questions about the readout fidelities (which is way low at the moment) and suppressing crosstalk.

That being said, quantum dots in Si/SiGE and SiMOS is a very exciting field these days.