BESR and BEWS instant restore

Of couse, this is the feature that already exist in other software such as TSM Fastback and Acronis. But I think it should also available within BESR and BEWS.
Let say that when you submit restore job and the restored files/system suddenly accessible. The blocks that requested by application will be redirected to the backed up copy while the restore job running in background until finish.
In case of BESR, after you submit the restore job. The system reboot to Windows system and start working while the restore job working in background. Of course, the performance of Windows (and application) on restoring system should be effected. But thinking of very very reduced RTO to nearly zero, I think that it worth.