Sometimes you just need to have an idea of how long a backup/restore has been running or maybe for how long it will roughly run. Here's a small script, that will give you these indications. 

SELECT 
  r.session_id,
  r.command,
  CONVERT(NUMERIC(6,2),r.percent_complete) AS [Percent Complete],
  CONVERT(VARCHAR(20), DATEADD(ms,r.estimated_completion_time,GetDate()),20) AS [ETA Completion Time], 
  CONVERT(NUMERIC(10,2),r.total_elapsed_time/1000.0/60.0) AS [Elapsed Min], 
  CONVERT(NUMERIC(10,2),r.estimated_completion_time/1000.0/60.0) AS [ETA Min], 
  CONVERT(NUMERIC(10,2),r.estimated_completion_time/1000.0/60.0/60.0) AS [ETA Hours], 
  CONVERT(VARCHAR(1000),(SELECT SUBSTRING(text,r.statement_start_offset/2, CASE WHEN r.statement_end_offset = -1 THEN 1000 ELSE (r.statement_end_offset-r.statement_start_offset)/2 END) FROM sys.dm_exec_sql_text(sql_handle))) AS [Command]
FROM 
  sys.dm_exec_requests r 
WHERE command IN ('RESTORE HEADERONLY', 'RESTORE DATABASE','BACKUP DATABASE', 'BACKUP LOG')