Thats a good sign, and if they really add it, Id say its a good move since a lot of casinos now start with casino games first and then later add a sportsbook. Its actually a good feature for a casino to have because sports betting is also a huge market. Just like me, I spend more than 50% of my gambling money on sports betting, so it would be much easier for users like me if everything is available in one place only.
It is very common lately, to have an active sportsbook in a casino. Vega Bet are up to the level of including sportsbook, smaller casinos do have sportsbook, and Vega Bet do need to add the feature, definitely helpful in the line of competition between them and other competitors.
We are also entering into the world cup tournament, there will be lots of bets going on during this period, the casino needs to be in haste and add the new feature, lots of gamblers are ready to deal on several bets.